Possible reasons for the automatic transmission jerking when shifting:
1. Low level or old gear oil:
* Dirty or insufficient oil can cause friction and slippage in the transmission.
2. Worn or damaged clutch friction discs:
*Clutch friction plates can wear and deteriorate over time, causing slipping and hesitation.
3. Faulty torque converter:
* The torque converter transmits torque between the engine and transmission. Torque converter malfunctions can cause slippage and vibration.
4. Problems with sensors:
* Sensors such as the speed sensor or throttle position sensor provide information to the transmission control module (TCM). Faulty sensors can lead to incorrect shifts.
5. Electrical problems:
*Electrical problems can interfere with the operation of solenoids and other transmission components.
6. Malfunctions in the transmission control module (TCM):
* The TCM controls the operation of the transmission. Faults in the TCM can cause erratic shifting and jerking.
7. Worn or damaged bearings and gears:
* Worn or damaged bearings and gears can cause noise, vibration and jerking.
8. Dirty or clogged hydraulic passages:
* Dirty or clogged hydraulic passages can interfere with oil flow and affect transmission performance.
9. Overheated transmission:
* An overheated transmission can cause low oil pressure and shifting problems.