Flex Plate/Torque Converter Vibration Test for Pontiac Montana Ext. 1999

To determine and correct a torque converter vibration, the following procedure may have to be performed several times to achieve the best possible torque converter to flywheel balance.

1. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.
2. Turn the engine OFF.
3. Remove the torque converter bolts.

Refer to Torque Converter Cover Replacement .

4. Rotate the torque converter one bolt position.
5. Install torque converter bolts.

Refer to Torque Converter Cover Replacement .

6. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.

Repeat this procedure until you obtain the best possible balance.