Wear or contamination of automatic transmission fluid:
* Low fluid levels or contamination can lead to insufficient lubrication and slipping in automatic transmission components, which causes jerking.
Faulty solenoids:
* Solenoids control the flow of fluid into the automatic transmission. A faulty solenoid can shift gears incorrectly, causing jerking.
Mechanical faults:
* Worn gears or synchronizers can make it difficult to shift smoothly.
* Leaks in the valve body or seals can cause loss of fluid pressure and jerking.
Electrical problems:
* Faulty speed or position sensors may send erroneous signals to the transmission control module, resulting in incorrect gear shifting.
* Wiring problems (breaks or short circuits) can disrupt the control of the automatic transmission, causing jerking.
Belt or chain slippage:
* If the belt or chain connecting the engine to the transmission slips, it may cause a temporary loss of power and a feeling of jerkiness.
Faulty Transmission Control Module (TCM):
* TCM is an electronic control unit that controls the automatic transmission. A malfunctioning TCM can result in incorrect shift control and jerking.
Other possible reasons:
* Worn or broken engine or transmission mounts.
* Incorrect connection of the cardan shaft.
* Faulty traction control system.