Possible causes of vibration after automatic transmission repair:
1. Incorrect assembly:
*Transmission components may not be installed or tightened correctly.
* Incorrectly adjusted gaps between components.
* Deformed or damaged parts.
2. Imbalance of components:
* Instability of the torque converter, clutches or other rotating components.
* Jamming or seizing of bearings.
* Worn or damaged gears.
3. Problems with the torque converter:
*A faulty torque converter may cause vibration when locking or shifting gears.
* Incorrect fluid pressure may cause slippage or vibration.
4. Problems with transmission fluid injection:
*Low fluid levels can cause starvation and overheating, which leads to vibration.
*A faulty oil pump or oil filter may be restricting fluid flow.
5. Hydraulic problems:
* Clogged or clogged solenoids or passages can cause valve misoperation and vibration.
* Faulty sensors may send incorrect data to the automatic transmission control unit, resulting in incorrect shifts.
6. Electrical problems:
* Faulty wires or connectors can cause solenoids or other electronic components to malfunction.
* A faulty automatic transmission control unit can lead to improper operation and vibration.
Diagnosis and troubleshooting:
* Check the transmission fluid level.
* Take it for a test drive and note the timing and speed at which the vibration occurs.
* Use the diagnostic scanner to check trouble codes and check real-time data.
* Open the automatic transmission and carefully inspect the components, looking for signs of wear, damage or improper assembly.
* Check the balance of the torque converter and other rotating components.
* Check fluid pressure and replace faulty oil pump or filter.
* Check the operation of solenoids and valves.
* Check electrical connections and replace faulty wires or connectors.
* Replace damaged or faulty components as necessary.
* Reassemble and tune the automatic transmission in accordance with the manufacturer’s instructions.