Possible reasons:
1. Insufficient transmission fluid level:
* Check the fluid level and add if necessary.
2. Contaminated transmission fluid:
* Replace fluid and filter according to your maintenance schedule.
3. Worn or damaged clutches:
* Caused by natural wear or excessive load on the automatic transmission. The automatic transmission may need to be repaired or replaced.
4. Damaged shift solenoid:
* Solenoids are responsible for controlling gear shifting. A damaged solenoid can cause rough shifting and jerking.
5. Malfunction of the automatic transmission electronic control unit (ECU):
* The ECU controls the operation of the automatic transmission. A faulty ECU can lead to gear shifting errors.
6. Problems with the torque converter:
* The torque converter connects the engine and automatic transmission. A worn or damaged torque converter can cause a jerk when slowing down.
7. Malfunction in control circuit:
* Problems with the wiring, sensors or switches associated with the automatic transmission can cause it to malfunction.
8. Weak oil pump housing spring:
* The oil pump housing spring maintains system pressure. A weak spring can result in insufficient pressure and shock.
What to do:
*Check transmission fluid level: Make sure the fluid level is correct and that the fluid is not dark or smells burnt.
* Take your vehicle in for diagnostics: A qualified mechanic can scan your vehicle for automatic transmission-related trouble codes and perform a physical inspection to determine the root cause of the problem.
* Consult a Professional: Automatic transmission repairs can be complex and expensive. Consult with an experienced mechanic to determine the best repair option for your specific case.