Possible causes of jerking when switching the automatic transmission selector:
Mechanical problems:
* Transmission fluid level is low: Check the fluid and add if necessary.
* Contaminated transmission fluid: Replace old fluid and filter.
* Worn clutches: They can slip, causing jerking.
* Faulty solenoids: These are responsible for shifting gears and can cause jerking if they fail.
* Torque converter problems: It may not transmit power properly, causing jerking.
Electronic problems:
* Faulty input shaft or output shaft speed sensor: They transmit speed information to the automatic transmission control unit.
* Faulty Transmission Control Module (TCM): It may misinterpret signals from the sensors and cause jerking.
* Faulty wiring or connectors: These can interfere with the transmission of signals between the various components of the automatic transmission.
Other reasons:
* Defective engine or transmission mountings: Jerking may be caused by excessive play between the engine and transmission.
*Transmission fluid that is too viscous or too thin: It can affect the operation of clutches and solenoids.
Troubleshooting:
* Diagnose the automatic transmission system using a diagnostic scanner.
* Check the level and condition of the transmission fluid.
* Check mechanical components such as clutches, solenoids and torque converter.
* Check the speed sensors and automatic transmission control unit.
* Fix any wiring or connector problems.
* Make sure the engine and transmission mounts are in order.