GM Service Manual Online
For 1990-2009 cars only

Engine Flywheel Replacement Automatic

Removal Procedure

  1. Remove the transmission. Refer to Transmission Replacement in Automatic Transmission.

  2. Object Number: 64554  Size: SH
  3. Remove the flywheel bolts.
  4. Remove the flywheel.

Installation Procedure


    Object Number: 64554  Size: SH
  1. Install the flywheel.
  2. Install the flywheel bolts.
  3. Tighten
    Tighten the bolts to 90 N·m (65 lb ft).

    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.

  4. Install the transmission. Refer to Transmission Replacement in Automatic Transmission.

Engine Flywheel Replacement Manual

Removal Procedure

  1. Remove the transmission. Refer to Transmission Replacement .
  2. Remove the clutch if equipped. Refer to Clutch Replacement in Clutch.

  3. Object Number: 64525  Size: SH
  4. Remove the flywheel bolts.
  5. Important: Do not machine the flywheel. Replace if necessary.

  6. Remove the flywheel.

  7. Object Number: 4080  Size: SH
  8. Remove the flywheel ring gear.
  9. • Use a torch to heat around the entire circumference of the ring gear, then drive the gear off the flywheel.
    • Do not heat the flywheel gear to red hot. This may cause the metal structure to change.

Installation Procedure

  1. Install the flywheel ring gear.
  2. • Uniformly heat the gear to a temperature that will expand the gear. The temperature should not exceed 204°C (400°F).
    • Install the gear, as soon as it had been heated, onto the flywheel.

    Object Number: 64525  Size: SH
  3. Install the flywheel.
  4. Install the flywheel bolts.
  5. Tighten
    Tighten the bolts to 90 N·m (65 lb ft).

    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.

  6. Install the clutch (if equipped). Refer to Clutch Replacement in Clutch.
  7. Install the transmission. Refer to Transmission Replacement Transmission Replacement.