Possible causes of strong vibration when engaging reverse gear of an automatic transmission:
Mechanical problems:
* Worn or damaged transmission mounts: As the mounts become worn, they may not effectively dampen vibrations transmitted from the transmission to the body.
* Faulty torque converter: The torque converter transmits torque from the engine to the transmission. A faulty torque converter can cause vibrations.
* Worn Friction Discs: The friction discs in the transmission wear out over time, which can cause slipping and vibration.
* Faulty planetary gears: The planetary gears inside the transmission can become worn or damaged, causing vibration.
Electrical problems:
* Faulty solenoids: The solenoids control the flow of fluid in the transmission. A faulty reverse solenoid can cause slippage and vibration.
* Faulty Shift Position Sensor: The shift position sensor tells the transmission which gear is selected. A faulty sensor may erroneously transmit reverse gear selection, causing vibration.
Hydraulic problems:
*Low Transmission Fluid Level: Insufficient fluid level can lead to poor lubrication and vibration.
* Contaminated transmission fluid: Contaminated transmission fluid contains metal particles and other impurities that can cause wear and vibration.
Other possible reasons:
* Incorrect exhaust system connection: Vibrations from the exhaust system can be transmitted to the body and can be felt when engaging reverse gear.
* Faulty driveshaft: The driveshaft connects the transmission to the rear axle. A faulty driveshaft can cause vibrations.
Diagnostics:
To determine the exact cause of the vibration, a comprehensive diagnosis in an auto repair shop is required. Diagnostic procedures may include:
*Visual inspection
* Reading fault codes
* Checking the level and condition of the fluid in the gearbox
* Checking the operation of solenoids and sensors
*Test ride