GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Astro - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 Case Extension Assembly Replacement

Removal Procedure

    Object Number: 656358 Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the transmission with a transmission jack.
  3. Place a drain pan under the vehicle.
  4. Remove the propeller shaft. Refer to Rear Propeller Shaft Replacement in Propeller Shaft.
  5. Remove the transmission mount. Refer to Transmission Rear Mount Replacement .
  6. Remove the case extension bolts (1).
  7. Remove the case extension (2).
  8. Remove and discard the case extension O ring seal (3).

Installation Procedure

    Object Number: 656358 Size: SH
  1. Install a new case extension O ring seal (3).
  2. Install the case extension (2).

    3. 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.

  3. Install the case extension bolts (1).

    4. Tighten
    Tighten the case extension bolts (1) to 45 N·m (33 lb ft).

  4. Install the transmission mount. Refer to Transmission Rear Mount Replacement .
  5. Install the propeller shaft. Refer to Rear Propeller Shaft Replacement in Propeller Shaft.
  6. Remove the drain pan and the transmission jack.
  7. Lower the vehicle.
  8. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to Transmission Fluid Check .