Flexplate/Torque Converter Vibration Test

Flexplate/Torque Converter Vibration Test

Isolating Vibration

Notice: Some engine/transaxle combinations cannot be balanced in this manner due to restricted access or limited clearances between the torque converter bolts and the engine. Ensure that the bolts do not bottom out in the lug nuts or the torque converter cover which could dent and cause internal damage.

To isolate and correct a flywheel or torque converter vibration, separate the torque converter from the flywheel to determine if vibration is in the engine or transmission.

1. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.
2. Turn the engine OFF.
3. Raise and suitably support the vehicle.
Refer to Vehicle Lifting.
4. Remove the transmission converter cover bolts and the cover.
Refer to Torque Converter Cover Replacement.
5. Verify the bolt torques attaching the converter to the flywheel are to specification.
6. Remove the bolts attaching the converter to the flywheel.
Refer to Flywheel to Torque Converter Bolt Replacement.
7. Slide the torque converter away from the flywheel.
8. Rotate the flywheel (1) to inspect for defects or damage.
Refer to Engine Flywheel Cleaning and Inspection.
9. Rotate the torque converter to inspect lugs and pilot (2) for damage. Verify the presence of balance weight on the outside diameter of the torque converter.
10. Lower the vehicle.
11. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.
Refer to Vibration Analysis - Engine. Vibration Analysis - Engine
12. Turn the engine OFF.

Installing Torque Converter

1. Raise and suitably support the vehicle.
Refer to Vehicle Lifting.




2. Align the torque converter pilot (2) in the engine crankshaft (3) and slide the torque converter up against the flywheel.
3. Lower the vehicle.
4. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.
Refer to Noise and Vibration Analysis. Noise and Vibration Analysis
Repeat this procedure until you obtain the best possible balance.
5. Install the transmission converter cover bolts and the cover.
Refer to Torque Converter Cover Replacement.