Possible causes of vibration when engaging an automatic transmission gear on a Nissan car:
* Worn or damaged engine and transmission mounts: These serve to absorb vibrations from the engine and transmission. Their wear can lead to increased vibration when shifting gears.
* Faulty torque converter clutch: It is responsible for transferring torque from the engine to the gearbox. Its malfunction can lead to vibrations and slippage.
* Contaminated or poor quality transmission fluid: It is needed to lubricate and cool transmission components. Contaminated or poor quality fluid can increase friction and vibration.
* Worn or damaged synchronizers: They serve to equalize gear rotation speeds when changing gears. Their wear can lead to difficult shifting and vibrations.
* Incorrect adjustment of the automatic transmission control cable: It is responsible for transmitting the signal from the gear selector to the gearbox. Incorrect adjustment can lead to harsh gear shifting and vibrations.
* Damaged gear teeth: Severely worn or damaged gear teeth in the transmission can cause vibrations and noise when the gear is engaged.
* Transmission housing problems: If the housing is damaged or deformed, it can affect the operation of the transmission and cause vibrations.
* Faulty gear selector position sensor: It detects the position of the gear selector and transmits this information to the automatic transmission control unit. Its malfunction can lead to incorrect gear shifting and vibrations.
Recommended actions:
* Check the level and condition of the transmission fluid. Replace fluid and filter if necessary.
* Inspect the engine and transmission mounts for wear or damage.
* Check the automatic transmission control cable for proper adjustment.
* Scan your vehicle for trouble codes that may indicate problems with the automatic transmission.
*Consult a qualified mechanic for diagnosis and repair.