Possible causes of vibration when engaging reverse gear of an automatic transmission:
Transmission problems:
* Faulty torque converter
* Wear of reverse clutches
* Defects in reverse gear teeth
Problems with supports:
* Worn engine or transmission mounts
* Faulty gearbox shank bearing
Problems with the driveshaft:
* Unbalanced driveshaft
* Worn spiders or splines
Differential problems:
* Wear of differential pinions or axle shafts
Other possible reasons:
*Low transmission fluid level
* Contaminated transmission fluid
* Electrical faults in the automatic transmission control system
Recommended actions:
* Check the level and condition of the transmission fluid.
* Inspect the engine and transmission mounts for wear or damage.
* Check the driveshaft for imbalance or defects.
*Consult a qualified mechanic for more detailed diagnosis and repair.
Note: Vibration when shifting into reverse may be a sign of a serious problem. Don’t ignore it and take it to a mechanic as soon as possible to prevent further damage to your vehicle.