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

Removal Procedure

  1. GM5106319Courtesy of GENERAL MOTORS COMPANY

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

  2. GM5060532Courtesy of GENERAL MOTORS COMPANY

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

  3. GM5607962Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect [2x]

  4. Remove the retainers (2) then reposition the wiring harness as necessary.
  5. GM5064000Courtesy of GENERAL MOTORS COMPANY

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

  6. Propeller Shaft @ Transfer Case - Remove - Propeller Shaft Replacement
  7. GM5605205Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Vent Hose Retainer (1) @ Turbocharger Outlet Duct Connector - Disconnect

  8. Power Transfer Unit Vent Hose (2) @ Power Transfer Unit Case (3) - Disconnect
  9. Support the power transfer unit with a suitable jack, and secure with suitable straps.
  10. GM5064793Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Bolt (1) - Remove

  11. GM5064816Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Bolt (1) - Remove [3x]

  12. GM5064828Courtesy of GENERAL MOTORS COMPANY

    Power Transfer Unit Case (1) @ Transmission - Remove

  13. GM5063646Courtesy of GENERAL MOTORS COMPANY

    Remove and DISCARD the power transfer unit face seal (1).

  14. Power Transfer Unit Face Seal (1) - Remove and DISCARD
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