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Home >> Buick >> 2022 >> Envision Preferred, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Power Transfer Unit/Transfer Case - AAM) >> Repair Instructions - On Vehicle >> Power Transfer Unit Case Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Clean the contact surfaces between the power transfer unit and the transmission.
  2. Power Transfer Unit Face Seal (1) - Install NEW
    GM5063646Courtesy of GENERAL MOTORS COMPANY
  3. Support the power transfer unit with a suitable jack, and secure with suitable straps.
  4. Power Transfer Unit Case (1) @Transmission - Install
    GM5064828Courtesy of GENERAL MOTORS COMPANY
  5. Power Transfer Unit Bolt (1) - Install and tighten [3x] 100N.m (74 lb ft)
    GM5064816Courtesy of GENERAL MOTORS COMPANY
  6. Power Transfer Unit Bolt (1) - Install and tighten100N.m (74 lb ft)
    GM5064793Courtesy of GENERAL MOTORS COMPANY
  7. Power Transfer Unit Vent Hose (2) @Power Transfer Unit Case (3) - Connect
    GM5605205Courtesy of GENERAL MOTORS COMPANY
  8. Power Transfer Unit Vent Hose Retainer (1) @Turbocharger Outlet Duct Connector - Connect
  9. Propeller Shaft@Transfer Case - Install - Propeller Shaft Replacement
  10. Power Transfer Unit Bracket (2) - Install - Power Transfer Unit Bracket Replacement 
    GM5064000Courtesy of GENERAL MOTORS COMPANY
  11. Position the wiring harness then install the retainers (2).
    GM5607962Courtesy of GENERAL MOTORS COMPANY
  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. Power Transfer Unit Heat Shield (2) - Install - Power Transfer Unit Heat Shield Replacement 
    GM5060532Courtesy of GENERAL MOTORS COMPANY
  15. Front Wheel Drive Shaft- Right Side (1) - Install - Front Wheel Drive Shaft Replacement - Right Side
    GM5106319Courtesy of GENERAL MOTORS COMPANY