Steps to take if the automatic transmission starts to jerk:
1. Stop and check the gearbox oil level.
*Low oil level may cause slipping or jerking. Add fluid if necessary, but only the same type as specified in the owner’s manual.
2. Check the condition of the transmission fluid.
*Brown or burnt fluid indicates the fluid needs to be replaced.
3. Scan trouble codes.
* Your vehicle’s on-board computer may store codes that can help identify the cause of the jerking noise. Use an OBD2 scanner to read the codes.
4. Check sensors and wires.
* Faulty sensors or wiring may cause the transmission to malfunction. Inspect connectors and wires for damage or corrosion.
5. Check the gear shift valve.
* The shift valve controls the fluid pressure in the transmission. A faulty valve can cause slipping or jerking.
6. Check solenoids.
* Solenoids control the flow of fluid through the transmission. A faulty solenoid can cause harsh shifting or jerking.
7. Check the torque converter.
* The torque converter transfers power from the engine to the transmission. A faulty torque converter can cause jerking or vibration.
8. Check for mechanical failure.
*In some cases, jerking may be caused by a mechanical problem such as worn gears or bearings.
Important:
*If the jerking is accompanied by other symptoms, such as noise, leaks, or rough driving, contact your auto repair shop immediately.
* Self-diagnosis and repair of an automatic transmission can be difficult and dangerous. If you do not have the necessary knowledge and experience, it is recommended that you contact a qualified mechanic.