An overfilled manual transmission, on the other hand, will show issues with the clutch. The excess oil will leak from the vent that affects the clutch and results in a gear-shifting problem. SEE MORE: Can You Drive When the Transmission Temperature Light Is On?
What do you do if you put too much transmission fluid in your car?
What Would Happen When You Put Too Much Transmission Fluid? If you overfill the transmission fluid to the car’s engine, it would foam and result in unpredictable gear shifting. Moreover, oil starvation as well as transmission damage are other possible issues.
Will too much transmission fluid make your transmission slip?
Too Much. An excessive amount of transmission fluid can negatively affect a transmission. When fluid levels are too great, it can result in air mixing in with the transmission fluid. This can cause slipping in a transmission as well as other gear-shifting issues.