Possible reasons for the lack of reverse gear in the Suzuki Grand Vitara automatic transmission:
*Low Transmission Fluid Level: Check transmission fluid level and add if necessary.
* Faulty reverse solenoid: The reverse solenoid is responsible for shifting the transmission into reverse. Replace it if it is defective.
* Malfunction of the transmission control module (TCM): The TCM controls the operation of the automatic transmission. Replace it if it is defective.
*Friction Disc Wear: Friction discs wear out over time and may not provide enough traction to engage reverse gear. In this case, replacement of the friction discs is required.
* Reverse Drum Wear: The reverse drum may become worn and may not provide adequate traction. In this case, the reverse drum needs to be replaced.
*Mechanical fault: There may be mechanical faults in the transmission that prevent the vehicle from engaging reverse gear. It will require professional diagnosis and repair by a qualified mechanic.
Possible actions:
* Check the transmission fluid level.
*Consult a qualified mechanic to diagnose and repair the problem.
* Avoid using reverse gear until the problem is corrected to prevent further damage.