Flexplate/Torque Converter Vibration Test (6.6L)

To determine and correct a torque converter vibration, use the following general procedure to achieve the best possible torque converter-to-flywheel balance. Refer to Transmission Replacement (With 6.6L Engine) for detailed procedure steps.

CAUTION: Refer to BATTERY DISCONNECT CAUTION .
1. Disconnect the battery.
2. Raise the vehicle halfway. Refer to Lifting and Jacking the Vehicle .
3. Remove the starter motor bolts and position the starter motor aside. Refer to Starter Motor Replacement (6.6L (LLY) Engine) .
4. Repeat this procedure until you obtain the best possible balance.
   • Unless already removed, remove the starter motor bolts and position the starter motor aside. Refer to Starter Motor Replacement (6.6L (LLY) Engine) .
   • Remove the torque converter bolts.
     Fig 1: Removing Torque Convertor Bolt

     Courtesy of GENERAL MOTORS CORP.
   • Rotate the torque converter one bolt position.
   NOTE: Refer to FASTENER NOTICE .
   • Install the torque converter bolts.

     Tighten:  Tighten the bolts to 60 N.m (44 lb ft).

   • Install the starter motor and starter motor bolts. Refer to Starter Motor Replacement (6.6L (LLY) Engine) .
   CAUTION: Refer to BATTERY DISCONNECT CAUTION .
   • Connect the battery.
   • Start the vehicle and test for vibration again.