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Home >> Buick >> 2018 >> Envision Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Power Transfer Unit/Transfer Case - AAM >> Repair Instructions - Off Vehicle >> Power Transfer Unit Case Assemble >> Power Transfer Unit Alignment Sleeve, Face Seal, Input Shaft Bearing Race, Idler Gear Bearing Race and Shim, and Idler Gear Shaft Tube Seal Installation

Power Transfer Unit Alignment Sleeve, Face Seal, Input Shaft Bearing Race, Idler Gear Bearing Race and Shim, and Idler Gear Shaft Tube Seal Installation

Fig 1: Exploded View Of Power Transfer Unit Alignment Sleeve, Face Seal, Input Shaft Bearing Race, Idler Gear Bearing Race and Shim, And Idler Gear Shaft Tube Seal Components
GM3793537Courtesy of GENERAL MOTORS COMPANY
Power Transfer Unit Alignment Sleeve, Face Seal, Input Shaft Bearing Race, Idler Gear Bearing Race and Shim, and Idler Gear Shaft Tube Seal Installation

Callout Component Name
1 Power Transfer Unit Alignment Sleeve

Procedure

  1. Install a NEW sleeve during assembly.
  2. Use a press to install the sleeve. Install the sleeve with the tapered end facing away from case. Press the sleeve into the housing until it bottoms in the case half bore.
2 Power Transfer Unit Face Seal
3 Power Transfer Unit Input Shaft Seal- Front

Procedure

  1. Make sure the seal bore is clean and free of oil or dirt.
  2. Install the NEW seal with the notched surface of the seal facing the DT-51466  Seal Installer with the metal ID portion of the seal facing the DT-51466  Seal Installer.
  3. Install the seal into the bore until the tool bottoms against the case half.

Special Tools

  • DT-51466  Seal Installer
  • DT-305 - 1  Driver Handle

Equivalent regional tools: Special Tools 
4 Power Transfer Unit Idler Gear Shaft Bearing Race- Front

Procedure

  1. The bearing races are not an interference fit to the housing bore.
  2. Apply a thin coating of assembly grease to the OD of the race to retain it in the housing.
5 Power Transfer Unit Idler Gear Shaft Access Tube O-ring- Front
6 Power Transfer Unit Idler Gear Shaft Bearing Race Shim- Front
NOTE:

The position of the shim for assembly.

7 Power Transfer Unit Idler Gear Shaft Bearing Race- Front

Procedure

  1. The bearing races are not an interference fit to the housing bore.
  2. Apply a thin coating of assembly grease to the OD of the race to retain it in the housing.
8 Power Transfer Unit Locating Pin [2x]
NOTE:

Install the locating pins as required.