Possible causes of vibration when the automatic transmission torque converter is locked:
Torque converter malfunctions:
* Worn friction linings
*Bent or worn turbine
* Fluid leakage from seals
* Damaged or clogged filter element
Transmission faults:
* Faulty or worn final drive
* Worn gears or bearings
* Faulty differential
*Low transmission fluid level
Other reasons:
* Unbalanced driveshaft
* Incorrectly installed or worn transmission stop
* Worn or faulty engine or transmission mounts
* Problems with tires or wheels
Diagnostics:
To diagnose the causes of vibration when the automatic transmission torque converter is locked, you must:
* Check the level and condition of the transmission fluid.
* Scan the on-board computer for fault codes.
* Inspect the torque converter and other transmission components for signs of wear or damage.
* Check the driveshaft and other drive components for imbalance or damage.
* Carry out a test drive to check the intensity and nature of vibration in various driving modes.
Solution:
Depending on the faults identified, the solution may include:
* Replacement of worn friction linings or other components of the torque converter.
* Repair or replace final drive, gears or other transmission components.
* Check and eliminate fluid leaks in the transmission.
* Balancing or replacing the driveshaft.
* Installing a new transmission mount or mounts.
* Troubleshooting tire or wheel problems.