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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Power Transfer Unit/Transfer Case - AAM >> Repair Instructions - On Vehicle >> Power Transfer Unit Case Replacement >> Installation Procedure
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Installation Procedure

  1. Clean the contact surfaces between the power transfer unit and the transmission.
  2. GM5063646Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Face Seal (1) - Install NEW

  3. Support the power transfer unit with a suitable jack, and secure with suitable straps.
  4. GM5064828Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Case (1) @ Transmission - Install

  5. GM5064816Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Bolt (1) - Install and tighten [3x] 100 N.m (74 lb ft)

  6. GM5064793Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Bolt (1) - Install and tighten 100 N.m (74 lb ft)

  7. GM5605205Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Vent Hose (2) @ Power Transfer Unit Case (3) - Connect

  8. Power Transfer Unit Vent Hose Retainer (1) @ Turbocharger Outlet Duct Connector - Connect
  9. Propeller Shaft @ Transfer Case - Install - Propeller Shaft Replacement
  10. GM5064000Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Bracket (2) - Install - Power Transfer Unit Bracket Replacement 

  11. GM5607962Courtesy of GENERAL MOTORS COMPANY

    Position the wiring harness then install the retainers (2).

  12. Electrical Connector (1) - Connect [2x]
  13. Fill the power transfer unit to the bottom of the power transfer unit fill plug hole with the recommended fluid. Adhesives, Fluids, Lubricants, and Sealers , and Approximate Fluid Capacities 
  14. GM5060532Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Heat Shield (2) - Install - Power Transfer Unit Heat Shield Replacement 

  15. GM5106319Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Shaft- Right Side (1) - Install - Front Wheel Drive Shaft Replacement - Right Side