Possible reasons:
*Low Transmission Fluid Level: Insufficient fluid levels can cause slipping and jerking when shifting.
* Contaminated Transmission Fluid: Dirty or old fluid can prevent smooth shifting.
* Worn Solenoids: Solenoids control the flow of fluid in the transmission and wear can cause rough shifting.
* Faulty Transmission Control Module (TCM): The TCM controls the transmission and a malfunction can cause jerking and jerking.
* Worn Clutches: Worn clutches can slip, causing a jerk when shifting into reverse.
* Faulty torque converter: The torque converter links the engine and transmission, and a malfunction can result in shock and vibration.
Troubleshooting steps:
1. Check the transmission fluid level and condition: Make sure the fluid level is sufficient and the fluid is clean. If necessary, add or replace fluid.
2. Scan for trouble codes: Using an OBD2 scanner, check for transmission-related fault codes.
3. Check Solenoids: The solenoids can be tested with a multimeter for resistance and continuity to factory specifications.
4. Check the TCM: The TCM can be checked using special diagnostic tools or by taking it to a dealer or transmission repair shop.
5. Check Clutches: Clutches typically wear out as a result of high levels of torque or slippage, so they need to be checked and replaced if necessary.
6. Check the torque converter: The torque converter can be checked for slippage and vibration using diagnostic equipment.
Warning:
Fixing automatic transmission problems can be challenging, so it is recommended that you leave the repair to a qualified mechanic or transmission repair shop.