Possible reasons:
Mechanical problems:
* Torque converter malfunction
* Worn or damaged friction discs
* Malfunction in the switching valve
* Leakage of working fluid
Electrical problems:
*Speed sensor malfunction
* Shift solenoid malfunction
* Wiring problems
Transmission Fluid:
* Low fluid level
* Contaminated or old working fluid
Other reasons:
* Engine wear
* Malfunction of the transmission control system
* Incorrect driving style
Solution:
1. Check the level and condition of the working fluid: Make sure that the fluid level is correct and that it is clean.
2. Connect the scanner: Connect the scanner to the vehicle to check for trouble codes that may indicate a specific problem.
3. Perform a Physical Inspection: Visually inspect the transmission and its components for leaks, damage, or signs of wear.
4. Check the torque converter: The torque converter converts torque from the engine and can cause shock if it is faulty.
5. Check the friction discs: The friction discs engage and disengage to change gears. Their wear or damage may cause shocks.
6. Check Shift Valve: The shift valve directs fluid to the corresponding friction discs. A malfunction may result in incorrect shifting and jerking.
7. Check Speed Sensor: The speed sensor provides vehicle speed information which is used to adjust gear shifting. A faulty sensor may cause the transmission to malfunction.
8. Check shift solenoids: Shift solenoids control the flow of hydraulic fluid through the shift valves. A faulty solenoid can cause jerking.
9. Check Engine: Worn or faulty engine can affect transmission performance.
10. Check the transmission control system: The transmission control system controls gear shifts and can cause shock if there is a problem.
Notes:
*Transmission troubleshooting can be complex and may require specialized equipment and experience to accurately diagnose and repair.
*Do not delay repairing a faulty transmission as this may result in further damage and more expensive repairs.
* Regular maintenance, including fluid and filter changes, can help extend transmission life.