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Home >> Buick >> 2021 >> Enclave Preferred >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Power Transfer Unit AAM) >> Repair Instructions - Off Vehicle >> Power Transfer Unit Case Assemble >> Power Transfer Unit Rear Output Shaft Housing Installation
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Power Transfer Unit Rear Output Shaft Housing Installation

WARNING: This page is about a different variant/trim than selected.
Fig 1: Power Transfer Unit Rear Output Shaft Housing Components Location
GM4256475Courtesy of GENERAL MOTORS COMPANY
Power Transfer Unit Rear Output Shaft Housing Installation

Callout Component Name
1 Power Transfer Unit Pinion Seal - O-Ring
Procedure 
Apply a thin coating of gear oil to the housing O-ring. Refer to Adhesives, Fluids, Lubricants, and Sealers 
2 Power Transfer Unit Rear Output Shaft Shim
3 Power Transfer Unit Rear Output Shaft Housing
4 Power Transfer Unit Rear Pinion Housing Bolt [ 8x ]
CAUTION:

Refer to Fastener Caution .


Tighten 
22 N.m (16 lb-ft)
5 Power Transfer Unit Output Shaft Seal
CAUTION:

When replacing power transfer unit case seals, use appropriate GM tools along with a hydraulic press. Failure to do so may result in misalignment or damage to the seal and/or power transfer unit.

Special Tools

  • DT-51834  Seal Installer
  • J-42176  Driver Handle

Equivalent regional tools: Refer to Special Tools .
6 Power Transfer Unit Propeller Shaft Seal - O-Ring
7 Power Transfer Unit Propeller Shaft Retainer
Procedure 
Install a NEW retainer.