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Extension Housing Assembly (4L80-E): Removal

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and suitably support the vehicle. Support the transmission with a transmission jack. Place a drain pan under the vehicle.
  2. Remove the propeller shaft. See REMOVAL & INSTALLATION in appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVE AXLES. Remove the transmission support and the transmission mount.
  3. Remove the case extension bolts. Remove the case extension. See Figure. Remove and discard the case extension O-ring seal.
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