Possible reasons:
1. Insufficient transmission fluid level
* Check the fluid level and add if necessary.
2. Contaminated transmission fluid
*Over time, the fluid can become contaminated due to wear and tear on transmission components. Replace fluid.
3. Problems with the transmission control valve
* The valve controls the fluid flow in the gearbox. If it is faulty, there may be a jerk when shifting into reverse gear.
4. Worn gearbox clutches
* Clutch clutches transfer power from the engine to the wheels. If they are worn out, shifting shock may occur.
5. Faulty speed sensor
* The speed sensor tells the transmission ECU the speed of the vehicle, which helps control the gears. A faulty sensor may result in incorrect shifting.
6. Mechanical problems
*If there are mechanical problems inside the transmission, such as damaged gears or bearings, it may cause shifting shock.
7. Electrical problems
*Electrical problems affecting the transmission control system can also cause jerking.
What to do:
* Check the level and condition of the transmission fluid.
* Replace the transmission fluid if it is dirty or abnormal in color.
* Take your vehicle to an experienced mechanic for diagnosis and repair.
Note: If the shock when shifting into reverse is accompanied by other signs of trouble (eg, slipping, noise), seek professional assistance immediately to prevent serious damage to the transmission.