Possible causes of vibration when engaging reverse gear in a Hyundai automatic transmission:
*Low or Old Transmission Oil: Insufficient or contaminated transmission oil can cause vibration.
* Worn or damaged transmission mounts: Vibration can occur if the transmission mounts are loose or broken.
* Damaged driveshaft: A faulty driveshaft can cause vibration, especially when shifting into reverse gear.
*Differential Problem: A worn or damaged differential may cause vibration when shifting into reverse.
* Faulty Transmission Output Shaft Speed Sensor: The sensor that monitors the output shaft speed may be faulty, resulting in poor shifting and vibration.
* Differential Lock: If the differential locks when shifting into reverse, it may cause vibration.
* Worn or dirty friction discs: Worn or dirty friction discs in an automatic transmission can cause vibration.
* Faulty Fluid Clutch: A faulty fluid coupling, which locks and unlocks the torque converter, can cause vibration.
* Worn synchronizers: Worn or damaged synchronizers in an automatic transmission can cause difficult shifting and vibration.
Recommended actions:
* Check the level and condition of the transmission oil.
* Inspect the automatic transmission mounts for looseness or damage.
* Check if there is any play in the driveshaft.
* Scan the electronic transmission control system for trouble codes.
*Consult a qualified mechanic for further diagnosis and repair.