My car has approximately 64,000 miles on it. In the last several weeks, it started to exhibit some transmission problems. Specifically, the issue is shifting into park. When I'm on a slight incline and shift it into park, I've noticed a ratcheting noise and the car starts rolling backwards. What might be causing this?
Hello. It sounds like the parking pawl inside the transmission might be failing. When an automatic transmission is put into park, it is mechanically shifted into neutral and the pawl will engage a gear connected to the output shaft of the transmission. If the parking pawl fails completely, then the vehicle will be free to roll. This part is internal in the transmission and generally the transmission will have to be opened up in order to have the part inspected and or replaced. You may need to have a shop that specializes in transmissions or the dealer look at this issue. Alternatively, you could also have a professional from YourMechanic inspect the shifting issue in person to have this properly diagnosed.