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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Automatic Transmission - ALLISON (Introduction, Service & Replacement)) >> Repair Instructions >> Seal Replacement - Rear Propshaft >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Align the seal so the seal lip (2) is outward and the face of the steel case (1) will be against the driving face (3) of the tool. Install the new seal onto J 43782  .
    IMPORTANT: Be sure the new seal has blue sealant coating the OD (4). This identifies the seal for use in the 1000 Series transmissions. The blue sealant identification is important because the 1000 Series transmissions have an overdrive ratio in fifth range and there is a potential for high output shaft speeds and resultant high seal temperature.
    Fig 1: Aligning Rear Propshaft Seal Lip Outward Onto J 43782
    GM659323Courtesy of GENERAL MOTORS CORP.
  2. Slide J 43782  over the output shaft until the seal enters the seal bore. Strike J 43782  with a mallet (1) to drive the seal into the seal bore. The seal is installed correctly when the shoulder of J 43782  squarely contacts the outer surface of the rear cover.
    Fig 2: Installing Rear Propshaft Seal
    GM659330Courtesy of GENERAL MOTORS CORP.
  3. Install the yoke assembly onto the transmission. Refer to Output Flange/Yoke Replacement .
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