would not go into 4th gear or over drive when motor was hot
My car has 24500 miles.
My car has an automatic transmission.
If the fluid is dark grey then you have worn out clutch material in the fluid. I would suspect the transmission will need to be overhauled or replaced. Have a certified mobile technician, such as one from YourMechanic, come out the car to inspect the shifting issue and examine the transmission fluid to determine if any repairs can be made.
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