GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1996 🢒 Aurora 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Case Extension Replacement

Removal Procedure
  1. Raise the vehicle. Support the vehicle. Refer to General Vehicle Lifting and Jacking in General Information.
  2. Disconnect the electrical connectors at the following components:
    3. • Power steering pressure switch
    • Vehicle speed sensor
  3. Remove the knock sensor heat shield.
  4. Remove the engine-to-transmission brace. Refer to Transmission Brace Replacement .
  5. Remove the air deflector.
  6. Remove the right splash shield.
  7. Place a jackstand under the right side of the frame.
  8. Remove the right transmission mount through bolt. Refer to Transmission Mount Replacement .
  9. Loosen the frame bolts on the left side.
  10. Remove the frame bolts on the right side.
  11. Lower the frame.

    12. Object Number: 97496 Size: SH
  12. Remove the case extension bolts.
  13. Remove the case extension housing.
  14. Inspect the bushing and the seal for cuts or nicks. Replace the bushing and the seal if damaged.

Installation Procedure

    Object Number: 97496 Size: SH
  1. Install the case extension housing.
  2. Install the case extension bolts.
  3. Raise the frame.
  4. Install the frame bolts on the right side.
  5. Install the frame bolts on the left side.

    6. Tighten
    Tighten the bolts to 54 N·m (40 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 right transmission mount through bolt. Refer to Transmission Mount Replacement .
  7. Install the right splash shield.
  8. Install the air deflector.
  9. Install the engine-to-transmission brace. Refer to Transmission Brace Replacement .
  10. Install the knock sensor heat shield.
  11. Connect the electrical connectors at the following components:
    12. • Power steering pressure switch
    • Vehicle speed sensor
  12. Remove the jackstand.
  13. Lower the vehicle.