Possible causes of automatic transmission jerking on Mitsubishi Pajero Sport:
1. Low transmission fluid level:
* Check and add transmission fluid according to manufacturer specifications.
2. Contaminated transmission fluid:
* Replace transmission fluid and filter according to the maintenance schedule.
3. Faulty torque converter lock-up solenoid:
* The torque converter lock-up solenoid may cause jerking when shifting from first to second gear.
* Check the solenoid and replace it if necessary.
4. Worn clutches or bands:
* Worn clutches or bands may not provide smooth torque transmission.
* Disassembly and repair of the automatic transmission is required.
5. Faulty input shaft speed sensor:
* The input shaft speed sensor transmits information about the vehicle speed to the automatic transmission control unit.
*A faulty sensor may result in incorrect gear shifting.
6. Faulty output shaft speed sensor:
* The output shaft speed sensor transmits information about the speed of rotation of the automatic transmission output shaft to the automatic transmission control unit.
*A faulty sensor can also cause the gears to shift incorrectly.
7. Faulty automatic transmission control module (TCM):
* TCM controls the operation of the automatic transmission.
*A faulty TCM can cause jerking and other shifting problems.
Troubleshooting steps:
1. Check the level and condition of the transmission fluid.
2. Run diagnostics using an OBD-II scanner to check for trouble codes.
3. Check the torque converter lock-up solenoid and speed sensors.
4. If necessary, have the vehicle towed to a workshop for further diagnosis and repair.