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.

Updated on April 15, 2018

Original Article:

Most Common Reasons Why a Transmission Slips
By Eddie Carrara

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