The clunking sound you hear when sliding the shifter past reverse into park is likely caused by the transmission linkage, which connects the shifter to the transmission. When you move the shifter, the linkage physically moves a lever or cable that engages the transmission's parking pawl. If this linkage is worn or damaged, it can make a clunking noise when it engages the parking pawl.
Lurching when Turning Ignition Off
The lurching you feel when you turn the ignition off is likely caused by the torque converter, which is a fluid coupling that connects the engine to the transmission. When the engine is running, the torque converter is filled with fluid and spins continuously. When you turn the ignition off, the fluid in the torque converter stops flowing and the torque converter locks up, which can cause the vehicle to lurch. This is especially noticeable if the transmission is in gear when the engine is turned off.
Here are some possible causes of worn or damaged transmission linkage and torque converter issues:
* Low transmission fluid: Low transmission fluid can cause the transmission linkage to wear out prematurely and can also cause the torque converter to lock up.
* Leaking transmission fluid: A transmission fluid leak can cause the transmission linkage to become dry and brittle, which can lead to wear and breakage. Low fluid levels can also cause the torque converter to overheat and fail.
* Worn or damaged transmission mounts: Worn or damaged transmission mounts can allow the transmission to move excessively, which can put strain on the transmission linkage and torque converter.
* Faulty transmission control module (TCM): The TCM is an electronic control unit that manages the transmission's operation. A faulty TCM can cause the transmission to shift erratically, which can put strain on the transmission linkage and torque converter.
* Faulty shift solenoid: A shift solenoid is an electromagnetic valve that controls the flow of transmission fluid. A faulty shift solenoid can cause the transmission to shift erratically, which can put strain on the transmission linkage and torque converter.
If you are experiencing any of the symptoms described above, it is important to have your vehicle inspected by a qualified mechanic as soon as possible. Ignoring these problems can lead to further damage to the transmission, which can be costly to repair.
