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Home >> GMC >> 2006 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 784 (Automatic Transmission - 4L80-E/4L85-E - Introduction (2 Of 2)) >> Repair Instructions >> Transmission Extension Housing Rear Oil Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Installing Transmission Extension Housing Rear Oil Seal
    GM744178Courtesy of GENERAL MOTORS CORP.
  1. Lubricate the inside diameter of the NEW seal with J 36850  . See Special Tools .
  2. Using J 41505  (1) and a soft faced mallet, install the seal (2). See Special Tools .
  3. Install the seal (2) to the extension housing (3).
  4. Install the propeller shaft. Refer to Propeller Shaft Replacement - Rear in Propeller Shaft.
  5. Remove the drain pan and lower the vehicle.
  6. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to Transmission Fluid Checking Procedure .
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