Savana 4500 V8-6.6L DSL Turbo (2009)
Extension Housing: Service and Repair
4L80-E/4L85-E - Automatic Transmission
Case Extension Assembly Replacement
Removal Procedure
1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair).
2. Support the transmission with a transmission jack.
3. Place a drain pan under the vehicle.
4. Remove the propeller shaft. Refer to One-Piece Propeller Shaft Replacement (See: Drive/Propeller Shafts, Bearings and Joints/Drive/Propeller
Shaft/Service and Repair/One-Piece Propeller Shaft Replacement) or Two-Piece Propeller Shaft Replacement (See: Drive/Propeller Shafts,
Bearings and Joints/Drive/Propeller Shaft/Service and Repair/Two-Piece Propeller Shaft Replacement).
5. Remove the transmission support and the transmission mount. Refer to Transmission Mount Replacement (See: Transmission Mount/Service and
Repair/4L80-E/4L85-E - Automatic Transmission).
6. Remove the case extension bolts (3).
7. Remove the case extension (1).
8. Remove and discard the case extension O-ring seal (2).
Installation Procedure
1. Install a new case extension O-ring seal (2).
2. Install the case extension (1).
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
3. Install the case extension bolts (3) and tighten to 34 Nm (25 lb ft).
4. Install the transmission support and the transmission mount. Refer to Transmission Mount Replacement (See: Transmission Mount/Service and
Repair/4L80-E/4L85-E - Automatic Transmission).
5. Install the propeller shaft. Refer to One-Piece Propeller Shaft Replacement (See: Drive/Propeller Shafts, Bearings and Joints/Drive/Propeller
Shaft/Service and Repair/One-Piece Propeller Shaft Replacement) or Two-Piece Propeller Shaft Replacement (See: Drive/Propeller Shafts,
Bearings and Joints/Drive/Propeller Shaft/Service and Repair/Two-Piece Propeller Shaft Replacement).
6. Remove the drain pan and the transmission jack.
7. Lower the vehicle.
8. Fill the transmission to the proper level with DEXRON(R) VI transmission fluid. Refer to Transmission Fluid Check (See: Fluid - A/T/Testing
and Inspection/4L80-E/4L85-E - Automatic Transmission).