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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (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 car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM3931381Courtesy of GENERAL MOTORS COMPANY

    Clean the contact surfaces between the power transfer unit and the transmission.

  2. Install a NEW power transfer unit case O-ring (1).
  3. GM4436573Courtesy of GENERAL MOTORS COMPANY

    Support the power transfer unit case (6) with a suitable jack, and secure with suitable straps.

  4. Raise and align the power transfer unit case in the correct position in relation to the transmission.
  5. Install the power transfer unit case to the transmission.
  6. Position the wiring harness bracket to the power transfer unit case.
  7. CAUTION:

    Refer to Fastener Caution .

  8. Install the wiring harness bracket bolt and tighten to 9 N.m (80 lb in).
  9. GM4852389Courtesy of GENERAL MOTORS COMPANY

    Install the 4 power transfer unit case bolts (2) and tighten to 100 N.m (74 lb ft).

  10. GM5315789Courtesy of GENERAL MOTORS COMPANY

    Transmission Rear Mount Bracket Bolt (1) - Install and tighten [2x] - Transmission Rear Mount Bracket Replacement

  11. GM3824314Courtesy of GENERAL MOTORS COMPANY

    Connect the power transfer unit vent hose (1) to the power transfer unit (2).

  12. Install the transfer case bracket. Transfer Case Bracket Replacement (2.0L LTG) , or Transfer Case Bracket Replacement (3.6L LGX) 
  13. Propeller Shaft - Install - Propeller Shaft Replacement