Flexplate/Torque Converter Vibration Test

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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 for detailed procedure steps as appropriate.

CAUTION: Refer to BATTERY DISCONNECT CAUTION .

Disconnect the battery.
Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
Remove the starter motor bolts and position the starter motor aside. Refer to Starter Motor Replacement (4.3L) or Starter Motor Replacement (4.8L, 5.3L, 6.0L, and 6.2L) or Starter Motor Replacement (6.6L) .

Fig 1: View Of Torque Convertor Bolt

Courtesy of GENERAL MOTORS CORP.

Remove the torque converter bolts.

Fig 2: Accessing Torque Converter Bolts

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 (4.3L) or Starter Motor Replacement (4.8L, 5.3L, 6.0L, and 6.2L) or Starter Motor Replacement (6.6L) .

CAUTION: Refer to BATTERY DISCONNECT CAUTION .

Connect the battery.
Start the vehicle and test for vibration again. If vibration is still present, repeat the testing procedure. Repeat this procedure until you obtain the best possible balance.