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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1613 (Automatic Transmission - ALLISON - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Rear Propeller Shaft Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Aligning Rear Propshaft Seal Lip Outward Onto J 43782
    GM659323Courtesy of GENERAL MOTORS CORP.
    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 and sixth range and there is a potential for high output shaft speeds and resultant high seal temperature.
  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  . See Special Tools .
    2. Fig 2: Installing Rear Propshaft Seal
    GM659330Courtesy of GENERAL MOTORS CORP.
  2. Slide J 43782  over the output shaft until the seal enters the seal bore. See Special Tools . Strike J 43782  with a mallet (1) to drive the seal into the seal bore. See Special Tools . The seal is installed correctly when the shoulder of J 43782  squarely contacts the outer surface of the rear cover. See Special Tools .
  3. Install the yoke assembly onto the transmission. Refer to Differential Drive Pinion Gear Yoke Replacement .
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