Causes of automatic transmission vibration when braking:
1. Low transmission fluid level:
* Insufficient fluid levels can lead to insufficient lubrication and increased friction, which causes vibration.
2. Worn engine or gearbox mounts:
* Worn cushions cannot effectively absorb vibrations, transferring them to the transmission.
3. Faulty torque converter:
* The torque converter transfers power from the engine to the transmission. A faulty torque converter can create an imbalance that causes vibrations.
4. Problems with differential:
* The differential distributes power between the wheels. A faulty differential can create additional vibration when braking.
5. Worn splines in the gearbox:
*Splines connect the various components of the transmission. Worn splines can cause vibration when transmitting power.
6. Brake problems:
* Worn or dirty brake pads or rotors can create uneven braking, causing vibrations.
7. Faulty universal joint:
* The driveshaft spider transmits power from the engine to the transmission. A faulty spider can create an imbalance leading to vibration.
8. Problems with the drive shaft:
* Drive shafts connect the differential to the wheels. A faulty drive shaft can create vibrations due to imbalance or uneven power transfer.
9. Unbalanced wheels or tires:
* Unbalanced wheels or tires can create vibrations that are transmitted through the transmission.
How to fix the problem:
* Check the transmission fluid level and add if necessary.
* Inspect the engine and transmission mounts for wear or damage.
* Check the torque converter, differential and transmission.
* Check the brakes for wear or contamination.
* Inspect the spider and drive shaft for damage or imbalance.
* Balance wheels and tires if necessary.