GM Service Manual Online
For 1990-2009 cars only

Vibration Test Procedure

  1. Start the engine.
  2. With the engine at idle speed and the transmission in Park or Neutral, observe the vibration.
  3. Turn the key off.

Removal Procedure

  1. Remove the bolts attaching the flexplate shield.
  2. Remove the bolts attaching the flexplate to the torque converter.
  3. Rotate the torque converter 120 degrees.

Installation Procedure

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the flexplate to the torque converter. Secure with the attaching bolts.
  2. Tighten
    Tighten the bolts to 62 N·m (46 lb ft).

  3. Install the flexplate shield. Secure with attaching bolts.

Start the engine and check for vibration. Repeat the procedure until you obtain the best possible balance.