The Most Common Reasons Why a Transmission Slips - AxleAddict - A community of car lovers, enthusiasts, and mechanics sharing our auto advice
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The Most Common Reasons Why a Transmission Slips

Eddie spent 35 years in the automotive business with Honda. He is an ASE Certified Master Technician and has bruised knuckles to prove it.

We all know what an automatic transmission is, basically—very basically, at least—so I'm not going to bore you with the details about how it converts power from your engine into power at the wheels. But you should know that the process involves plenty of hydraulic fluid as well as gears and clutches.

If you don't know why your car’s transmission is slipping, I just might have the answer, though you may not want to hear what I have to say.

The cause of a slipping transmission will depend on the type of transmission you have in your vehicle. There are three types of transmissions: automatic, standard (or “manual”), and CVT (continuously variable transmission). I will discuss the two most common types, automatic and standard.

Why Is My Automatic Transmission Slipping?

If you have an automatic transmission and it "slips" while you are driving it—that is, the car engine revs without the power going to the wheels—the most common cause (though not the only possible cause) is low transmission fluid. If the slipping is caused by low fluid, it will get worse as the transmission gets hotter.

Why Is My Manual Transmission Slipping?

A standard (“manual”) transmission uses fluid too, but leaks aren’t a common issue; a standard transmission could lose all its fluid and never slip at all, though eventually, it would lock up while driving down the road. If you have a standard transmission, and it’s slipping—the engine revs but it doesn’t transmit power to the wheels—the problem is usually in the clutch.

Further down in the article, I discuss how to diagnose this problem.

Sounds Like Low Transmission Fluid to Me

What to Do If Your Automatic Transmission Is Low on Fluid

The next question is, why? Probably because you have a leak. Maybe you have noticed red transmission fluid in your driveway or your parking spot at work, but it didn’t occur to you that it came from your car. The cause of your leak is probably a failure of one of the seals that keep the oil inside the transmission (though there are other places the transmission might leak). How many seals the transmission has depends on whether you have a front-wheel-drive, four-wheel-drive, or rear-wheel-drive car.

If you do have a seal that is leaking, and you catch it in time before it damages your transmission, there’s a chance it might be relatively cheap to repair. Seals themselves are not expensive parts, but depending on where they are located, it might take a lot of labor to replace them.

If you have the leak checked out by your mechanic, and he tells you it’s just your axle seal, it could just cost you for a couple hours of labor, and you could be back on the road in a few hours if the parts are readily available. Axle seal failures are common, and the dealer will usually have those seals in stock. But if it's your input shaft seal, plan on leaving your car for a day or two, and expect the labor cost to be upwards of eight to ten hours.

Input Shaft Seal: Another Site for Leaks

Leaking input shaft seal.

Leaking input shaft seal.

This photo shows an input shaft seal leak. To replace this seal, the transmission needs to be removed from the car; this job can get costly.

Be sure to check your owner's manual on how to check your transmission fluid.

Be sure to check your owner's manual on how to check your transmission fluid.

Typically you fill the transmission through the dipstick tube, using a small funnel.

Typically you fill the transmission through the dipstick tube, using a small funnel.

Checking and Topping Off Automatic Transmission Fluid to Prevent Slipping

If your transmission is leaking, you will want to fix it. Meanwhile, if you must drive a car with a leaking transmission, you should top off the fluid.

Check your owner’s manual to see exactly how you should check your transmission fluid level. Some manufacturers will want you to check the transmission fluid level when the engine is warmed up and running with the transmission in park, other manufacturers like Honda will have you check it with the engine warmed up but not running. So be sure to read your owner's manual, DON'T GUESS!

If your transmission fluid level is low and not showing on the dipstick, add transmission fluid--the proper transmission fluid. Each car manufacturer uses a specific fluid. If you use the wrong fluid, you could damage your transmission internally, so again, check your owner's manual. Fill it to the top line on the dipstick and then drive it to your mechanic.

Note: Sometimes when an automatic transmission is low on fluid and you top it off, air pockets develop inside the transmission that keep the fluid from getting to all the parts of the mechanism. After adding the fluid, I suggest that while the car is running, you move the shift lever through the different gears on the shifter selector, and then check the fluid again. Running the shifter through the gears redirects the fluid to different parts of the transmission and removes the air pockets. You may have to do this procedure several times, or even drive the car around the block, and then recheck the fluid level.

Note: I do not recommend using additives that are supposed to stop leaks; they can plug up the transmission. Use the automatic transmission fluid your car manufacturer makes.

How to Check Your Transmission Fluid

Other Fluids That Leak From Cars

If you are concerned about other fluids besides automatic transmission fluid that seem to be coming out of your car, here's some useful advice.

Clutch disc and pressure plate. The clutch looks like it blew apart. If you ride your clutch it may look like this.

Clutch disc and pressure plate. The clutch looks like it blew apart. If you ride your clutch it may look like this.

Common Cause of Manual Transmission Slippage: Worn-Out Clutch

If you think your clutch is starting to slip, you can try a stall test. Put your car in third gear and try starting off like you would normally, as if you were in first gear. If your clutch is working properly, letting the clutch out all the way should stall the car. If, however, the clutch is slipping, the engine RPMs will rise, the car will slowly start rolling, and you will have a smell like burning paper coming from the engine compartment. When a clutch starts slipping you will smell it. It’s like the smell of overheated brakes.

There are many reasons why a clutch would slip, but the most common reason is that the clutch is worn out. A clutch disc can last anywhere from 20,000 to 200,000 miles—it all depends on the way you drive—but like a brake pad, it’s a consumable item, and will be used up eventually, leaving the parts grinding metal-on-metal. If the clutch disc is worn out, you need to replace it, generally also along with the clutch plate and one or two bearings. If you don't replace a worn clutch in time, you might have to replace the flywheel (the big chunk of metal next to it) as well.

Riding your clutch—that is, leaving your foot on the clutch pedal when you aren’t using it—can really eat up a clutch disc fast, especially if you drive in hilly areas. Just being a newbie and learning to use a clutch for the first time can cause a lot of wear and tear. Learning to drive on a standard transmission can end up costing you money if you don't get the hang of it quickly.

Then again, clutches slip for reasons not related to wear and tear or abuse. If your input shaft seal is leaking gear oil onto the clutch disc, this could very well cause a slipping clutch. Another common reason for a slipping clutch is a faulty or damaged pressure plate. The pressure plate is operated by a high-tension spring. If for some reason the pressure is not distributed evenly over the clutch disc, the clutch will start to slip.

Blown Clutch: It's Completely Worn Out

I Appreciate Your Questions!

There are many possible reasons for a slipping transmission and I could not cover all of them above. If you have any questions just leave them in the comment box below.

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

Questions & Answers

Question: I have a 2011 Chevy Silverado 2500 HD. This morning, as I was driving about 30 mph, the engine started to roar as if in neutral. It did this about three times for about a mile until I could get home. I later drove around the neighborhood and it does seem to make a vibrating noise at times, and it also seems like it is shifting at times. The fluid level seems normal. It is a used vehicle that we purchased three months ago, so I know nothing about the history. What could this be?

Answer: If the fluid level is OK, it's possible you may have a solenoid or valve that is sticking or not working properly.

Question: I have 2012 Silverado, and the transmission slips while driving. If I stop and restart the engine, it drives fine. Do you have any idea what this could be?

Answer: It sounds like something electronic, like a solenoid or valve, so it could be a quick fix.

Question: I have a 2004 Ford F150 Heritage with 186,000 miles. After a warm-up, as I brake the truck shutters as it comes to a stop and then stalls. I can restart the engine, but unless I rev the engine as I shift to drive, the truck stalls again. Is this problem the torque converter, one of the sensors (I've replaced the 2-speed sensors) or the trans itself?

Answer: Most likely the torque converter is stuck in lock up, so it could be the lock up solenoid or something internally wrong in the torque converter.

Question: I have a '98 Corolla manual. Lately, I've noticed it revs high and is sluggish in first and second, but is fine once it's in third. Could there possibly be a vacuum leak?

Answer: The high rev could be a vacuum leak at idle. The sluggishness is more likely a bad spark plug or spark plug wire. A bad spark plug or spark plug wire will fire well under a load, but once you get the vehicle up to speed, the engine will run smoothly.

Question: I've got an 83 Yamaha Maxim 750cc. It doesn't slip per say, but it pops out of first gear and back into neutral on its own. It only does this from first gear, and it happens more frequently as the engine warms up. What could cause it? I Haven't checked the clutch cable to see if it's loose, but the stall test is fine. I'm at a loss

Answer: Usually, when a transmission pops out of gear it's because a shift fork is bent inside the transmission. The shift fork is what moves the synchro up and down the gear, and if it becomes bent for whatever reason, it will slip out of gear.

Question: While accelerating, my manual transmission seems to slip. Would that be the clutch or a deeper issue?

Answer: On a manual transmission, the only way it can slip is from the clutch. If you start from a stop in second gear and the clutch doesn't grab the point and almost stalls the engine, then most likely, the clutch is on it's way out.

Question: My 2008 Ford f150 like thumps a little when running 45 or so. It doesn't jerk or rev, it just feels like someone has a rope tied to the back and giving it a quick little tug. Is that my transmission?

Answer: It could be but it sounds to me like maybe a bad spark plug, plug wire, coil or something to do with spark, it's just a hunch.

Question: Is there any chance to fix and recover my slipping transmission instead of purchasing a new one?

Answer: If your transmission is slipping, start with the basics. Check the fluid level and condition, address as needed. If the check engine light or check transmission light is on, have the codes pulled, it will point you to what is going wrong with the transmission. Sometimes a filter and fluid change can correct slipping issues, sometimes the problem will need more diagnosis.

Question: I have a 2004 Honda Pilot with 262,000 miles on it. For the past four years, maybe once or twice a season it would slip out of drive after a stop. It either shifted to 2nd gear, or turn off. Restarting the car would remedy the problem, and then it would not happen again for weeks or months. This past year, it happened a few times, and then not for days. Lately, it's happened quite often until I had my power steering pump replaced. Since then, it has happened only once or twice. Does this make any sense?

Answer: It sounds like you may have an electronic solenoid failing. If the check engine light is on or the "D" light is flashing, have the codes read, it will point you to which solenoid is failing.

Question: I have a 2003 Honda Accord EX. It has 185,000 miles and has a transmission issue. When I take my foot off of the accelerator for a couple of seconds, the transmission immediately wants to downshift. I have an automatic transmission. The transmission does this at slow and fast speeds, but not so much above 50 mph. Is my transmission bad, or do I have bad solenoids?

Answer: If the check engine light is not on and the "D" light on your PRNDL2 is not flashing then you know it's not an electronic solenoid failure or issue. If the fluid is dirty or not at the correct level, this could also cause some issue like this. Honda transmission fluid levels are checked with the engine off and the car on level ground. Only use Genuine Honda transmission fluid, or you will have shifting issues.

Question: I have a 1994 Honda Accord Automatic. It starts and drives about two blocks. Then, as soon as I stop and start to accelerate again, there is no movement. If I turn the car off for about 5-10 minutes start it back up it drives again for about a block or two, then it stops. I've checked TCU transmission fluid and code lights. Any idea what it could be?

Answer: It sounds like your transmission has a clog. I recommend using light compressed air through each check port on the transmission and see if you can move the debris around.

Question: I own a Toyota Axio, and it uses CVT fluid. It's not accelerating as fast as it should when I press the gas pedal. It does so only momentarily before going back to normal. I have replaced the spark plugs, cleaned the throttle and replenished the CVT fluid to a reasonable level, but nothing has helped. Does my gear need replacing?

Answer: No, I don't think so. Look to see if the check engine light is on.

Question: What would make an automatic transmission not engage if the fluid is full?

Answer: It's usually a lack of pressure. The problem could be a pump, filter O-ring, blocked passage, etc.

Question: When I shift, my car revs up before speeding up. Is the clutch going out?

Answer: It's possible your clutch is going out.

Question: I have a Newly rebuilt trans on a F-250 7.3 2001. First and second gear seem to slip when trans oil temp reaches 190. It was taken apart 3 times and no issues were seen. A triple disk converter was added. Any ideas?

Answer: You're losing pressure somewhere, it could be an o-ring, crack in the valve body, a valve not closing all the way. Do you have another valve body you can swap out?

Question: I have a 1994 Chevy 1500, and it slips when it is hot. What could the problem be?

Answer: What is the condition of the fluid and the color? If the filter hasn't been changed in a while it's possible debris is collecting in the screen and causing a flow problem. I recommend starting by checking these items.

Question: I have a 2001 Dodge Ram. If I romp it to the rug, it gets to about 4-grand and then acts like it goes into neutral. What could be the cause?

Answer: Sounds to me like your losing pressure inside the transmission and it is going into neutral. Have you checked the transmission fluid yet? Also check the condition of the fluid, if it is very dirty the pickup screen could be restricted.

Question: My 2003 Honda Pilot is slipping and static shifting after I drive it hard for ten minutes. When you first drive it, it doesn't slip or shift hard. Could it be the shifter solenoid or overdrive solenoid?

Answer: The most common condition people overlook is the transmission fluid. The fluid is either too low or very dirty. Dirty fluid can cause all kinds of shifting issues because it clogs up small passageways going to the shift solenoids. If the fluid level is low, there's not enough fluid to fill all these passages, and the transmission lacks pressure internally. This will lead to poor shift quality or no shift at all. So I recommend checking those two conditions first.

Question: Just bought a Honda Accord 99 V6 V-tec and it has a slipping transmission. Where do I start?

Answer: I alway recommend starting by checking the fluid level and condition. If it's black, replace it a couple of times and see if it helps.

Question: I have Lexus ES 2011. The auto transmission is having some issues with hanging and then suddenly shifting with a slight jerk move from 2nd to 3rd or 4th gear. This happens in between 40, sometimes 60 to 65 KM/H. Also, the RPM needle sometimes goes slightly up or down in a shaky movement by itself. Any suggestions about what it could be?

Answer: You should maybe have the transmission serviced, or you can check the fluid level and overall condition.

Question: My 2000 Tundra's rebuilt automatic transmission has about 70,000 miles on it and began slipping, but has no transmission leaks. Can this be adjusted out, or does the transmission need to be replaced?

Answer: It's best to have a transmission expert or a Toyota tech check it out. Sometimes a sticking valve or solenoid can cause a slip. Also dirty fluid could also cause shifting problems.

Question: My transmission is squirting gear oil on my clutch. If I put a new seal in, can I use the old clutch, or do I have to buy a new one?

Answer: I recommend replacing at least the clutch disc, but it's best to replace the assembly. You already have everything apart, and you're looking at about $150 in parts.

Question: My 2013 Ford Focus sticks at a high rev when I am on the highway and accelerate to pass. It hangs up there for maybe three seconds then comes back down - when I am going 70-75. What gives?

Answer: I recommend checking the throttle linkage and throttle plate for any carbon build up. Try cleaning up the plate with carb clean and clean the inner and outer moving parts as well, then use some spray lube on the external moving parts.

Question: I have a 5.2 liter, Dodge 1500 truck. I took the pan off and cleaned the valve body. I also adjusted the bands. Now, when I take off, it doesn't slip, but at about 20 miles an hour it locks up the rear tires. What's causing that?

Answer: I think you adjusted the bands incorrectly. I recommend consulting a transmission expert, someone who knows Dodge transmissions. It sounds like you're pretty mechanically inclined, so if you pick the transmission expert's brain, they should be able to get you rolling again.

Question: What should I do when my cars automatic transmission is shifting abnormally when it gets hot?

Answer: I always recommend checking the fluid level and condition first. If it dirty or low, change it or top it off.

Question: I have a 1999 Honda Civic, and I recently changed the clutch and pressure plate, but I'm getting clutch slip. Any ideas on what to try next?

Answer: Yes, I recommend replacing the rubber hose in the hydraulic system, if the hose collapses inside the clutch will lack pressure when releasing the pedal.

Question: My 2005 Honda Civic automatic transmission 1.7 engine is jumping while shifting but not revving up. Today it popped out of gear, and the engine was still running, had to coast to stop. Put it in park, reverse, and then drive, went into gear and drove home, it jumped a few more times, so I manually shifted until I got home?

Answer: I recommend checking the fluid level and condition first. If the fluid level is low, top it off, if it is black or gray, I recommend changing the fluid a couple times and see if your situation improves.

Question: Are there any other problems aside from the clutch disk that could make my RPM go high with low power?

Answer: If the pressure plate is weak it can cause the same issue, also if any oil gets on the disc it can cause it to slip.

Question: I have a 2005 Chevy TrailBlazer LT 4.2L with 167,000 miles. My transmission started slipping when going into third gear but I can’t check my fluid because my dipstick broke in the tube. How do I check my fluid level?

Answer: You can remove the dipstick tube from the transmission, it it either pressed into the transmission housing or there is a bolt holding it into the case. Remove the tube and buy a new dipstick.

Question: How do I adjust shifter arms on a 1991 Honda Accord?

Answer: There is no adjustment on shift arms on a 91 Honda Accord.

Question: Can I use Valvoline CVT Full Synthetic Continuously Variable Transmission Fluid in my 1999 Mercedes Benz automatic transmission?

Answer: No, use the recommended Mercedes Benz transmission fluid.

Question: My Honda Accord 2007 shifts weird only in the morning. Sometimes it won’t shift into gear or hard shift. I have a leak on my axle seal. I replaced the seal, but it still leaks. My mechanic says I have to change the cv axle because it's leaking. What should I do?

Answer: I recommend a second opinion on the leak. A mechanic can very easily damage the axle seal during installation, and it would be very unusual to have to replace an axle because of this leak.

Question: I recently had my transmission refurbished when I noticed a small leak and the car would switch from first gear to neutral for few seconds and then back. Do you know what's happening or what I should do?

Answer: You should bring your car back to the shop that rebuilt the transmission and have them check out the leak and the slipping. If it's a reputable shop, they should have some kind of warranty.

Question: The input shaft seal of my Toyota Corolla broke. The ATF was lost, and I have since replaced it. But now the transmission is slipping. What could be the cause?

Answer: Be sure to check the owner's manual for the proper procedure on how to check transmission fluid level; not every car is the same.

Question: Even since I've changed my transmission fluid, I've been getting about 5-6 mpg less. The transmission is slipping, and sometimes it falls into neutral when downshifting. I've checked the levels while the engine was running, and it's about 1cm above the full line. Also, it seems to be driving at higher RPMs than usual. What could be the problem?

Answer: On some vehicles, the engine should be off and the car on level ground before checking the transmission fluid level. I recommend you check your owners manual for the proper way to check the transmission fluid level.

Question: My fifth gear engages, and l can drive while l am supporting it, but when l let go of the shift lever it goes back to neutral. You can push it back to neutral without stepping the clutch. What is the problem?

Answer: The shift fork for that synchro is most likely bent.

Question: What would cause a 4l65e transmission to, while traveling down the highway, all of a sudden jump out of drive? 1st gear is great, 2nd gear starts good, but then it starts a grinding noise until my speed reaches 25-30. Then the grinding noise stops as I shift into 3rd gear at 40 mph. It drives fine until I go back down to 40, then it slips out of gear. There is no 4th (drive) at all; I can only manually shift.

Answer: It sounds to me like you have some internal problems with your transmission, and it will probably need to be disassembled to find the cause.

Question: The fluid itself isn’t super low, but does seem old, can this be causing my automatic transmission to slip?

Answer: Absolutely. I recommend checking the transmission for leaks first, then doing a transmission fluid change. It's a cheap test to see if the shifting improves.

Question: Why is my transmission slipping into fifth gear? I bought a new fifth gear and its sleeve, but the transmission is still slipping.

Answer: If the gear is staying engaged but the clutch is slipping, then most likely the clutch is slipping, not the gear set.

Question: I have a 2012 CRV. Five weeks ago, I had a bad skid on ice and hit a steel grate built into the sidewalk. This caused approx 9000 dollars in damage to the tires, wheels and suspension systems. I just picked the car up, and it is jerking when I drive about 30-35 mph. When I drive from 45-50 mph, it stops. Is this a transmission problem, and could I have caused it when I hit that grate?

Answer: If the problem wasn't there before you hit the curb, it might have something to do with either the accident or it sitting so long. I recommend bringing it back to the shop that did the work and take them for a test drive to show them the problem, maybe it's a quick fix. I would also let your insurance company know what's going on and keep them in the loop.

Question: My Cherokee XJ transmission only slips on super humid days in the rain. What do you think the cause of this could be?

Answer: I don't think it's your transmission, It sounds more like a skip in the engine, and that would make more sense.

Question: I have a 2003 Impala which I had a rebuild done on in February 2016. Now (out of warranty) the car fires up and goes into any gear without hesitation for about 30 seconds then makes a noise and all of the gears go out. I turn the car off and restart it and then it will again work for about 30 seconds?

Answer: I recommend brining it back to the shop that did the rebuild. It sounds like you have an electronic solenoid that is failing.

Question: I just changed the fluid in an automatic transmission. It didn't seem to have any type of slipping, but it does now. I know a lot of times it will break down pre-existing stuff and cause problems. My question is, is it possible that it's just working the new fluid into the transmission? Maybe there were air pockets from when I drained it, and it's possibly filling them?

Answer: No, the fluid is not breaking in. Have you checked the fluid level? Sometimes after filling it, there are air pockets, so you need to take a short drive ( one mile) and recheck it; sometimes 2 or 3 drives before all the air is out and the level is correct.

Question: When I was driving in 5th gear, the car revved up, but didn't gain speed. Then when I came to a stop, there was nothing, no gears. Is that the clutch?

Answer: If the car has a standard transmission, it's possible your clutch disc failed, or the pressure plate is broken.

Question: I have a 2010 Jeep Grand Cherokee that is slipping between 30-40mph, but only when the rpm is low (2000 rpms.) When I’m up to over 3000 rpms, there is no slip. What is my problem?

Answer: It might be the engine skipping or hesitating.

© 2011 Eddie Carrara

Please Add Your Questions and Comments Here

Eddie Carrara (author) from New Hampshire on August 29, 2020:

Hi Nimrod,

The overdrive light is flashing because there is a code in the TCU. I recommend you have someone retrieve the code so you can diagnose the faulty part causing the problem. I hope this helps.

Nimrod musongwa on August 25, 2020:

Hi there.. i have a mark 2 gx 100. The teansmission finds it difficulty to shift the gears from 1 upward not until you rev too much and picks up. The speedometer cant move and the overdrive light blinking on and off on its own . Changed the ATF and cleaned the strainer but no change .pliz help

Eddie Carrara (author) from New Hampshire on August 24, 2020:

Sorry Rey, I didn't see your message. Have you checked the fluid level and condition? What is it like? Do you notice any leaks under the vehicle?

Rey on August 16, 2020:

What is the cause of that sir. Maybe Transmission heat sensor? Not running if cold transmission.

Rey on August 16, 2020:

Hello sir have a good day. I have toyota camry 2004 automatic transmission.. My problem on my car is can shift to reverse and its fine but wont move on shift drive and 3,2, 1 .. After 5minutes of pushing acceleration on high rpm will run slowly until comes back to normal running again.. What is your advice sir. GOD bless

Eddie Carrara (author) from New Hampshire on August 15, 2020:

The first thing I would try is to replace the fluid and filter if possible, you're losing pressure at idle and it may be due from a partially clogged filter because the transmission shifts normally during driving.

F15020015 4 on August 13, 2020:

I have a 2001 f150 xlt 5.4L automatic transmission

Frequently while at a stop my automatic transmission will (seem to shift back into neutral) then require high rev/more gas in order to shift into drive again, and it jumps when this happens.

When (even from start-up) changing from neutral or park into D,1,2 the vehicle has no pull as automatics tend to have. The vehicle can even begin to roll back while stopped on a hill in drive.

Transmission fluid checked at idle is full, color could be better but is not far from normal.

The range sensor seems to be original and when underneath the vehicle the line, while bolted onto the switch changes with gears, however has never been north to south as i checked every gear.

While diving transmission shifts normal and smooth.

Also at idle and stop while in drive the rpms drop to arpund 5-550 while normally 650-7.

No leak, and the transfer into gear from a stop can take 10-15 yards without a firm gas pedal press. Then it jerks into gear and runs fine until another long stop.

Recently replaced leaking/faulty water pump. And oil level is just short of the max line. Truck did run hot after water pump was replaced and used all coolant left in a day. Refilled and coolant levels are normal.

Eddie Carrara (author) from New Hampshire on July 29, 2020:

Hi Pablo,

Most likely the clutch is worn and is slipping in the higher gears.

Pablo Smith on July 26, 2020:

1983 Honda Accord manual transmission slipping from 5th gear to 4th gear. What’s the problem?

R. Collier on July 25, 2020:

I have a 2001 isuzu trooper LS w/3.5 auto 4x4 w/T.O.D auto 4WD and on the dash it has a display of the T.O.D's and there is a check light under this display for that system/tcu to let you know if it is having a problem, i have that light flashing for some strange reason, my engine is running perfect, the transmission is as should be, 4wd low high and auto still appears to be doing as it should be and i have checked everything on the tod system (wires, vac lines, valves, etc.) and found no problems there, the puter gives me a 13, 14, & 24 code but both front & rear sensors check good in the transfer case so i checked the one in the transmission also to find nothing wrong there either, I can't find the problem and the light will not reset with the puter!!

Any suggestions other than pulling the bulb from the dash, it had something go wrong to cause this to happen but i can't find it!!!

Eddie Carrara (author) from New Hampshire on May 30, 2020:

Hi Halie,

That sounds like an internal issue maybe like a first gear clutch pack or torque converter issue. Did you try taking it to a transmission specialist like Aamco or Toyota? That would be where I recommend you take it. Sorry, I don't have a simple fix for you. Are you sure you're reading the fluid level correctly, some manufactures have the engine running, transmission in park, vehicle on flat ground and some check it with the engine off so check your owners manual and let me know, thanks.

Halie98 on May 28, 2020:

Hey Eddie not sure if my previous question went through or not, but I have a 2010 Corolla S 135k miles and have been having this issue since about 80k miles. When accelerating transmission often slips, revs increase significantly before car jumps forward into gear. All fluids are level, even had the transmission flushed and filter changed, taken to multiple mechanics can’t find the issue.

Halie on May 28, 2020:

Hey Eddie. I have a 2010 Corolla with about 135k miles, been having the same problem since about 80k. Whenever I go to accelerate past about 2-3rd gear the transmission slip, first revs increase and then it jolts into gear. The fluid levels are fine, even had the transmission flushed and filter changed. I’ve taken it to multiple shops they can’t seem to find the issue

Eddie Carrara (author) from New Hampshire on May 16, 2020:

Hi Mac!

Mac on May 13, 2020:

Hello

Eddie Carrara (author) from New Hampshire on April 16, 2020:

Hi Stewart,

What is the condition of the fluid, is it clean and pink or gray and dirty? Did you follow the manufacturer's recommendations on how to check the fluid? I believe the vehicle needs to be running in park on level ground.

Stewart on April 16, 2020:

I have a 2007 Lincoln Town Car and the transmission seems to slip when I stop and get ready to go again when it has heated up. I checked the fluid level and it is correct. I am wondering what this may be.

Eddie Carrara (author) from New Hampshire on April 14, 2020:

Hi Cash,

The whining noise may be a sign of the transmission pump starving for fluid or internal damage. If the transmission filter is serviceable I recommend replacing the filter and fluid first and also have the filter inspected for any debris that may be clogging it or metal shavings. If the check engine light is on, it's a good possibility there is a transmission code stored that may also point you to the fault in the transmission. Let me know what you decide to do or if you have more questions, thanks.

Cash Garrett from Sevierville TN on April 13, 2020:

I have 2003 Saturn Vue AWD with an "on the floor" automatic transmission.

I can start it, and immediately put it into drive and, it drives fine for about 50 yards then it goes into neutral. I shut it off, let it sit for maybe 30 minutes or more then it engages properly for again, 50 yards or less then, goes into neutral again. I checked the fluid, per users manufacturer says, it's more Burgundy than Red but, the level seems okay. So, I don't know what else to do.

One other thing I forgot to mention is, when I start the Saturn Vue for the very first time, while completely cold, I hear a whining sound like that of a power steering low fluid issue, then, after a few sends or so, it goes away. There are NO tranny leaks at all. I'm puzzled.

Eddie Carrara (author) from New Hampshire on April 09, 2020:

Hi Derek,

No, but a quick look with a flashlight in the area where you see the drips may lead you to what's leaking or what has failed, usually, it's a line or axle seal that fails but you'll need to see the leak to verify. I recommend you add some manufacture's recommended trans fluid and get it to a shop for repairs asap or have it towed.

Derek on April 08, 2020:

I was driving on the highway and all of a sudden i heard my car a 2013 Lincoln mkz awd 3.5 start revving like it was in neutral when i parked i noticed a little tranny fluid on the pavement any idea what this would be i drove home and it seemed to shift fine

Eddie Carrara (author) from New Hampshire on April 06, 2020:

Hi Ed,

Yep, that sounds about right. It is very difficult to completely remove the trans fluid from the coolant so one more flush after driving it for about a week will be a good idea. Keep an eye on the transmission fluid and the shift quality (Captin obvious here lol) just be sure the trans fluid looks clear and pink, not milky.

Ed on April 04, 2020:

They say will see some residue of oil in the reservoir coming out from the engine for the coolant system and will need to do another round of flushing in the future after driving it for a bit for it to come out.

Ed on April 01, 2020:

Ok

Eddie Carrara (author) from New Hampshire on April 01, 2020:

Hi Ed,

Yes, but it may cost a little more if they cannot clean it with just 8 quarts, and make sure you check both fluids when you pick up the car to make sure it is flushed and clean :) Keep me posted, and thanks for the update.

Ed on April 01, 2020:

Thanks for all the great info Eddie. A shop said they could do it and quoted me almost $900 total for a new radiator, thermostat, upper and lower hose, flushing transmission and coolant system with additional 8quarts of oils at least plus labor for a full day of work. Does that sounds right or fair? Thanks

Eddie Carrara (author) from New Hampshire on April 01, 2020:

Hi Ed,

You'll need to find a shop that has a transmission flush machine, not all shops have them, and be prepared to have a lot of shops turn down that type of work, it's not a moneymaker, it's a pain in the butt!

You'll need to explain to them what I told you "the transmission cooler is failed internally and coolant and the trans fluid is mixed in both the transmission and cooling system".

We have had success flushing both systems with no future problems as far as we know. but I don't recommend you drive the vehicle have it towed. When an automatic transmission slips it is taking years of life off the transmission and could also be doing more damage.

Keep me posted on what happens, thanks.

Eddie Carrara (author) from New Hampshire on April 01, 2020:

Hi Heather,

I recommend you check the transmission fluid level and condition first. If you are unsure of how to check the transmission fluid level, refer to your owner's manual for the proper procedure. If the fluid level is low or extremely dirty it's probably the reason for your issue. Let me know what you find, thanks.

Ed on March 31, 2020:

It’s not advisable to drive right and I need to tow it? And do I do flatbed or drag on 2 wheels? Would it have caused damages already from my trip back or it should still be fine or try to drive to the mechanic? Just want to make sure so the mechanic won’t try to rip me off trying to get me to get a new transmission as the easy solution

Ed on March 31, 2020:

Ouch. So any mechanic should be able to do it professionally? How do I know if they have the capability to do so. What kind of questions should I ask. Thanks Eddie

Thomas Joseph Wood on March 31, 2020:

Ed,

As soon as I hear from him I will let you know as I have been waiting a couple of days now to hear from him.

Heather0517 on March 31, 2020:

Automatic

Eddie Carrara (author) from New Hampshire on March 31, 2020:

Hi Ed,

It sounds to me like the radiator has failed internally between the transmission cooler and the radiator. This is a mess and it can be fixed, but it can get a bit pricey. The radiator will need to be replaced and then the engine cooling system will need to be flushed with a degreaser/water solution, then the transmission will need to be power flushed with about 12 quarts of transmission fluid or flushed with a machine until the transmission fluid comes out clean. The transmission fluid may cause the cooling system hoses to swell and some may need to be replaced as well. Both of these flushed take a lot of time and the fluid is not cheap so you're looking at about $1000-$1500. If you have this service done, it needs to be done professionally and completely, if any residual coolant is left in the transmission it can cause a slipping issue. As I said, this is a mess and it can get very pricey. Hope this helps and let me know how you make out or what you decide to do, thanks :)

Eddie Carrara (author) from New Hampshire on March 31, 2020:

Hi Thomas,

Let me know if he is able to help, thanks.

Eddie Carrara (author) from New Hampshire on March 31, 2020:

Hi Heather,

Is this an automatic or standard transmission?

Ed on March 31, 2020:

Hi Eddie,

I have a 2008 EXL V6 Accord. While I was driving up a ramp on the highway the other day, I think I might have experienced a gear slip(where it have high rev all of a sudden at 4k RPM but the car is not moving as fast) unless I let down the gas then it will shift back down normally. I try to slowly accelerate by pressing on the gas slowing and sometimes it works and shifts up normally but if I give more gas too fast it will shift down a gear and rev high again. I stop the car and inspected the dip stick. I was surprised it was out of transmission fluid. I went to bought a few quarts immediately and top it off through the dip stick channel. Continued my journey home hoping that that solves it, it seems fine at first until it started doing that again. It was hard to get the car over 30mph especially uphill where it will rev up again. I finally got back home and found out that liquid was overflowing from my coolant reservoir that is connected to my radiator and it is milky pink in color and I checked the transmission dip stick and surprised it is out again when I just topped it off. In addition there seem to be a slight milky pink to it too. Since then I haven’t drove the car for days as I want to figure out what is wrong before I do Incase I need to tow as I only get one tow from the insurance.. Not sure what is wrong with it and if I should tow the car to a mechanic or drive it. Help!

Thomas Joseph Wood on March 30, 2020:

ok thanks

Heather0517 on March 30, 2020:

I have a 2012 Chevy Captiva and randomly while we are driving the engine will rev really high and once I take my foot off of the gas it lowers and drives normal it’s almost like it thinks it’s shifting into neutral

Eddie Carrara (author) from New Hampshire on March 30, 2020:

Follow this link to one of his pages, you could search out an article of his that is similar to your problem or you can click the link next to his picture that says "Contact Author" https://axleaddict.com/auto-repair/Honda-Accord-Sp...

Thomas Joseph Wood on March 30, 2020:

How do I get a hold of hardlymoving?

Eddie Carrara (author) from New Hampshire on March 28, 2020:

Hi Thomas,

I believe the engine needs to be running and the vehicle needs to be on flat ground. Usually, there are two lines or dots on the dipstick, hot level, and cold level. Make sure the fluid level is topped off completely. If the check engine light is on it could give you an idea of what is failing as well. There are a lot of things that could cause this problem like debris in the valve body, cracks in the filter o-ring or a damaged filter/screen. It sounds like something is clogging slowly as you drive then when you shut the car off the debris releases and the car will move again for a few miles but without opening up the pan and inspecting the valve body and screen/filter it's hard to say if that's what is happening.

There is another Author here on HubPages that knows Toyota well, you may want to ask him if he has ever experienced your problem. His pen name is hardlymoving, let me know if he has any suggestions :)

Thomas Joseph Wood on March 28, 2020:

So it is also possible that there still isn't enough transmission fluid in the transmission even at 6.5 quarts?

Thomas Joseph Wood on March 28, 2020:

All of the transmission fluid that is in the car is new as after the cooling line was changed, we drained the fluid and replaced it all new fluid. Right now there is 6.5 quarts in the transmission.

If it is an electrical issue, what would that be so I know where to look.

Also, do you think that it could be a shift solenoid that has gone bad?

Eddie Carrara (author) from New Hampshire on March 28, 2020:

Hi Thomas,

Did you check the fluid again after the road test? The transmission holds a lot of fluid, even a honda transmission holds anywhere from 9-12 quarts so double-check the fluid level road test it, then check it again. If the level is completely full and you still have an issue, the fluid may have a lot of debris in it clogging the screen/filter or you may have an electrical issue. Let me know what you find, thanks.

Thomas Joseph Wood on March 26, 2020:

I put an additional 1.5 quarts of transmission fluid and took the car out for a ride. It ended up doing the exact same things and as the car got warmed up, it started doing the same thing, revving loudly as it started to slow down to a stop with the engine still running. I then turned off the car, started it right up and it went into gear for a short distance before it started slowing down to a stop. HELP!

Thomas Joseph Wood on March 26, 2020:

It has been told to me that a transmission can have up to 8 quarts in it and it is quite possible that a lot of that leaked out from the rusted cooling line. Putting in 3 quarts as the manual suggest may not be enough in that case and I have already added 5 quarts and the problem still persists but now the car goes farther before it comes to a stop with the engine still running. Do you think that I need to add another 2 to 3 quarts to make sure that the transmission is fully fiilled?

Eddie Carrara (author) from New Hampshire on March 22, 2020:

Hi Tom,

The best way to fill a transmission if you're unsure of how much fluid was lost is to follow the direction in the owner's manual because some vehicles are checked with the engine running and others are checked with the engine off. Always triple check the fluid level, you'll need to run it through the gears either on a lift or suspended off the ground (safely) or by road testing it. Sometimes there are air pockets in the transmission that can only be driven out so once you get the level close to full take the vehicle for a good road test and check it once more to be sure all the air pockets are gone.

The pickup screen or filter is located in the pan on most transmissions and I believe the Corolla is located there as well. You will need to unbolt the pan to replace or clean it. Let me know how you make out or if you have more questions, thanks.

Tom on March 20, 2020:

Do you feel that because I lost a lot of transmission fluid thru the rusted out cooler line, that 5 quarts of fluid is not enough and I should add more?

Also, where do I find the pick up screen/filter?

Eddie Carrara (author) from New Hampshire on March 20, 2020:

Hi Tom, I recommend you check the pick up screen/ filter first because it may be getting clogged from some debris that is inside the transmission. That’s where I would start and if everything’s OK there I would dig deeper. Let me know what you find, thanks.

Thomas Joseph Wood on March 20, 2020:

2006 corolla. Replaced transmission cooling lines as they were rusted, Put 3 quarts of new fluid in the tranny. When car starts, it goes into gear and then once it heats up, it slows to a stop while engine still runs. I turn off car and then start it back up and then car goes into gear and then after a short distance it slows to a stop. What is causing this?

Tom on March 20, 2020:

2006 corolla. Replaced tranny cooling lines as they rusted causing me to lose fluid. Replace with 5 quarts of fluid. When car starts and goes into gear but as it warms up it slows to a stop while engine still runs but car wont goo. Turn off the car, start it back up and then it goes again until it slows down to a stop. What could be the problem?

Eddie Carrara (author) from New Hampshire on March 11, 2020:

Hi Lorraine,

Do you hear any abnormal noises like a loud exhaust or hissing noise?

Lorraine on March 10, 2020:

My 07 Impala drives fine for 20-30 minutes then looses acceleration and wont go over 40 mph motor just revs when I try to speed up

Eddie Carrara (author) from New Hampshire on February 28, 2020:

Hi Jason,

First, check the transmission fluid condition and level according to the owners manual, if the level is ok it's possible there is an electronic solenoid or valve that is failing that is causing the issue.

Jason chastain on February 27, 2020:

My lexus drives for few min. Slips and stop pulling i can cut car off start right back up and goes again whats my ppromble

Eddie Carrara (author) from New Hampshire on January 07, 2020:

Hi Peewee,

Have you checked the fluid level and condition yet? I recommend you start there and if everything looks ok you can take the diagnosis to the next step.

Eddie Carrara (author) from New Hampshire on January 07, 2020:

Hi Kerry,

Have you checked the fluid level yet? If not, check that first and be sure to follow the proper procedure recommended from the owner's manual and let me know what you find, thanks.

Eddie Carrara (author) from New Hampshire on January 07, 2020:

Hi Chris,

It sounds like either you have a solenoid not working properly or there is an intermittent clog in the transmission. If the transmission fluid is dirty and smells burnt I recommend you start with a transmission fluid change or flush and see if it improves the performance. Let me know if this helps and keep me posted on what you do.

Chris on January 06, 2020:

My son has a 2011 gmc Denali while driving the transmission slips out of gear he checked the fluid level shows good the temperature reads 172 degrees. He sits for awhile with it off and then it will go back into gear can drive about 2 miles and does it again. Any ideas

Kerry Kinambaka on January 03, 2020:

I have a Toyota Corolla Auto, with a 3zz-fe engine. My proplem is that when i angage a gear be it revears or frond gear, there is a slip but after severel accereration the gear picks but with a jack, what might be the problem?

Peewee on January 03, 2020:

I have a 1992 Silverado 1500 I just brought 6 months ago.when driving 1,2gear works fine.3gear won't get I would have to put it on low

Eddie Carrara (author) from New Hampshire on December 18, 2019:

Hi Rick,

It sounds like pressure loss under heavy acceleration which can be caused by a worn pump, leaking o-rings, or contaminated fluid. You may want to have a transmission expert diagnose the problem before you cause more damage just in case it's an easy fix. Keep me posted on what you find, thanks.

Eddie Carrara (author) from New Hampshire on December 18, 2019:

Hi Tom,

It sounds like the fluid pick-up screen is becoming clogged while driving causing the transmission to lose pressure but without properly diagnosing it this is only a guess. If the fluid is dark you may want to start with a transmission fluid service. Let me know what you find, thanks.

Eddie Carrara (author) from New Hampshire on December 18, 2019:

Hi Sonya,

You could start by checking the transmission fluid level but without a check engine light and without seeing the vehicle I have no idea what is causing your issue. There are a lot of things that can cause this problem so if the transmission fluid is good you'll need to have a mechanic diagnose it.

Sonya Decembly on December 17, 2019:

Hello , I have a 2003 volkswagon pssat, I startit up and it in drive but it sounds like its on the wrong geat and it dont have alot of speed

R0isthe highest it will go., could it need transmission fluid or major problems. No light came on. HELP!

Eddie Carrara (author) from New Hampshire on December 15, 2019:

Hi Chris,

Is the check engine light on? Does your speedometer work? That is very unusual, let me know if the check engine light is on, thanks.

Thomas Kelly on December 15, 2019:

98 lincoln town car drives and shifts normally fluid is full.. Can be traveling at 65 to 75 and transmission stops pulling let it coast down to 55 to 60 and it will start pulling again. This happened back in the summer and then stopped then Friday started to doing it again. Any help would be appreciated

Rick on December 14, 2019:

2002 ford explorer transmission slipping. No other problems or warnings. Baby it never slips. Gives po codes 733 and po745.

Chris wasden on December 14, 2019:

I have a 2003 Honda pilot why would the transmission shift in to low gear while going down the hwy at 60or70 it goes all the way to first and some time's stays in first and won't shift back up

Eddie Carrara (author) from New Hampshire on December 06, 2019:

Hi Vev,

I would start by checking the fluid level, if it's ok you may need to have it diagnosed by a transmission specialist, diagnosis isn't too expensive, but the repair might be.

Vev on December 05, 2019:

I have a 2011 Ford F-150 ecoboost. Drove it on trip pulling trailer and had absolutely no problems. Parked it overnight and get in next morningbput in drive it moves about 200 ft and slips motor revs and it gear indicator goes to 5th. Any ideas on stuff to troubleshoot without going broke?

Eddie Carrara (author) from New Hampshire on November 17, 2019:

Hi Melissa,

Changing the fluid is a cheap quick check to see if the shifting improves. I also recommend you replace the filter at the same time. Keep me posted on how you make out, thanks.

Melissa on November 14, 2019:

My 2011 Chevy Impala revs like in neutral when I try to reverse after warming up for about 10-15 minutes. Then does the same when I put it in drive. After about 30 minutes of driving, it seems to shift better. This has progressively been getting worse for about a year. Yesterday as I was driving I noticed when I got up to 60mph my rpm was well over 3 and I couldn’t get to 65mph. I pulled over, put it in park and started again and it drove fine. Checked my fluid and I have too much. Would a fluid change help?

Eddie Carrara (author) from New Hampshire on November 12, 2019:

Hi Mario,

Possibly an adjustment but I need to see the engine/trans arrangement at the throttle.

Eddie Carrara (author) from New Hampshire on November 11, 2019:

Hi Liz,

It sounds like the transmission fluid is low (foamy) I recommend you start by topping off the fluid and see if it drives any better. The harness is most likely part of the sensor, so I recommend replacing the sensor/harness.

Eddie Carrara (author) from New Hampshire on November 11, 2019:

Hi Andrew,

I recommend you check the transmission fluid level first, low fluid is the most likely cause, if it's ok you'll have to dig deeper.

Eddie Carrara (author) from New Hampshire on November 11, 2019:

Hi Cheryl,

Either they didn't top off your transmission fluid after replacing the axle or they may not have inserted the axle completely into the transmission. I highly recommend you tow it back and make sure to mention to the mechanic that you didn't have this issue before the axle was replaced, you only hand a noise and now this is a different problem, most likely mechanic made.

Cheryl cahill on November 11, 2019:

2000 Lincoln continental was in the shop they took out the left scide of the cc boot drive shaft out and put in a new one the we could here noise comming from the left front tire it was luke it was spunning when it was in park. Then i was driving the car and it had no power at all then it would drive again just put in a brand new battery yesterday drove it to the store no power at no 123 and reverse and drive. I could here a nose when it was in 1 gear like it was trying to go in gear when they put in the new cvbootdrivs shaft did they do it ronf or is the tranny going or is the cvboot drive shaft stripped in scide the transmission

Andrew on November 11, 2019:

When i put the toyota camry into drive it doesnt move untill the car warms up then it drives fine. 94 v6 camry

Liz on November 10, 2019:

Awd disable and anti lock lights on, dtc showed abs wheel speed sensor harness to be replaced. Not seeing issues on any part of the harness, thought bout replacing connector on hub but would it of said that instead of harness if that was issue or no?

Also, my car jerks when switching gears and downshifts if you accelerate too quickly or when going up a hill, jerking seems to be worse when low on gas and car been running along time. Rpms rev higher until switches gears and seems to coincide with a "winding" noise, happens even when idle but is worse on acceleration. I flushed the transmission and did tune up bout 5-6 months ago, been checking the fluid periodically not until recently did it seem foamy cuz it has bubbles in it and showing way past the hatchmarks.

Please help and gimme some idea of where to start. All of these symptoms can be ALOT of different things. This is on a 2005 buick rendezvous 3.4l.

Mario on November 09, 2019:

I have a 02 Acura TL type s with 215xxxxx miles and when your just driving around normal shifts just fine no issues but once you give it gas to pass someone up or to get on hwy trans shifts around 5500-6000 rpms but dosent ingauge the gear until you let off gas can that be my trans pressure sensors????!?

Eddie Carrara (author) from New Hampshire on October 29, 2019:

Hi Hector,

The clutch disc may be worn, the pressure plate may be weak, or you could have fluid on the clutch assembly like from a leaking seal. I believe you will probably need a new clutch assembly.

Eddie Carrara (author) from New Hampshire on October 29, 2019:

Hi Phil,

Usually, when a transmission has these symptoms it caused by debris clogging up a pick-up or passes way but you said the fluid level and color are normal so it's possible there is an electrical issue with one of the solenoids or valve body.

Eddie Carrara (author) from New Hampshire on October 29, 2019:

Hi Fabian,

It sounds like you have lost 2nd gear completely. You'll need to bring it to a transmission specialist so they can pressure test the trans to diagnose the problem.

Fabián valadez on October 28, 2019:

I have a ,02 chevy tahoe first gear drives smooth then it does not go into second my rpm just reves and goes smoothly into 3rd i already replaced tranny oil filter and selinoids and no improvement can you give me your opinon

Phil on October 24, 2019:

I did not see any visible damage. The check engine light is on but it was on before it got stolen. Error Code P1633 is defined as Keep Alive Power Voltage Too Low. This is the code that came up before it got stolen. I recovered the car yesterday and i have not been able to have it rescanned. So i am not sure if there are any new codes. The car has 178k miles and in 2 months it was gone there was roughly 10k miles driven. If the trans is losing main pressure, could that be caused by a sensor and/or damaged internal seals? I do realized i need to get it scanned, but it wont make it to the nearest auto parts store.

Hector on October 24, 2019:

ihave a 2003 honda civic m anual transmission and my cuestios is why the 5 gear slps i put new gear oil on it and stll doing the same please help me whit the thank you

Eddie Carrara (author) from New Hampshire on October 24, 2019:

Hi Phil,

It sounds like you're losing main pressure, is there any damage to the transmission under the vehicle?

Phil on October 23, 2019:

2006 ford escape 3.0 v6 fwd auto. My car was stolen and i just recovered it after about 2 months. It starts and runs good. I am able to shift into all gears and drive. But after about 2-3mins the car loses all gears, it is like i shifted into neutral. There is no noise, i almost dont even realizes it happens until i give it more gas and it just revs, just like in neutral. If i shut off the car and wait 5-10mins i can drive it again, but only for 2-3mins. The trans fluid is full and a normal color. The engine oil is low and burned up. But what are some possible reasons for this? Where should i start?

Eddie Carrara (author) from New Hampshire on October 22, 2019:

Thanks Sergio, Keep it topped off and you can make it last forever :)

Sergio Fuentes of Ontario , Oregon on October 21, 2019:

Thank you. Great artical I bave a Honda Passport when it idies it seems like its shifting, it does have a leak and i just filled it and it got the extra power i filled it through the pan in the bottom of the transmission.

Eddie Carrara (author) from New Hampshire on October 15, 2019:

Hi Bernard,

The pressure plate could be lacking spring pressure or your engine has cylinder compression leakage (worn rings, burnt or pitted valves, etc. Let me know if this helps.

Eddie Carrara (author) from New Hampshire on October 15, 2019:

Hi Ryan,

Depending on the type of transmission, the screen or filter could be clogged and gets worse once the fluid moving or your fluid may be very contaminated. Those conditions are where you should start your diagnosis.

Eddie Carrara (author) from New Hampshire on October 15, 2019:

Hi JB,

It could be a pressure switch or the clutch pack o-ring but usually, an o-ring would cause slippage, not a neutral condition.

JB on October 10, 2019:

I recently replaced the torque converter and shift solenoids in my Honda also flushed out the lines changed 4 other solenoids and I'm still having an issue with it slipping out of second gear and it sometimes makes a weird shuddering sound when idling unless I rev It Up it will go away ,you think it's the 2nd clutch pressure switch? I've got way too much time and money and blood in this car For it not to be fixed .PLEASE HELP.

Ryan on October 07, 2019:

Why does my transmission slip only when it's hot?

Bernard F. Foryasen on October 06, 2019:

On a 30 degree incline, I parked my manual transmission SUV. My handbrake is not working so I engaged my shifter to 1st gear. But when I released the foot brake pedal, the car slides down gradually and intermittently. What must be wrong?

Eddie Carrara (author) from New Hampshire on October 03, 2019:

Hi Alyssa,

I recommend you start with the obvious, if there's a problem with the shift cable, replace that first and see if you still have the problem. It is possible your vehicle was not in gear completely and it slipped out because of the cable. Let me know what happens, thanks.

Alyssa on October 03, 2019:

Hi. I have a 2008 Mazda 6 with an automatic transmission. Today, it felt as if my car had slipped into neutral on its own, because I wasn’t able to move too fast and the engine would rev but there was no acceleration. The only way to get it back to normal was by turning the car off and back on again. However I’m still worried. I bought the car used and I know that I have to replace the shifter cable, but I haven’t gotten around to it. Could the slipping be due to the shifter cable finally wearing out? Or a bigger issue with the transmission?

Eddie Carrara (author) from New Hampshire on September 30, 2019:

Hi James,

I recommend you check the connector (inspect it for corrosion) at the speed sensor if that looks ok inspect the wire harness from the sensor to the PCM for any rodent damage if no problems are found, check the wires for continuity from the sensor to the PCM.

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