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Home >> Buick >> 2018 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (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. GM3931381

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

  2. Install a NEW power transfer unit case O-ring (1).
  3. GM4436573

    Support the power transfer unit case 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 .

  7. Install the wiring harness bracket bolt and tighten to 9 N.m (80 lb in).
  8. GM4852389

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

  9. GM3824314

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

  10. Install the transfer case bracket. Transfer Case Bracket Replacement (2.0L LTG) Transfer Case Bracket Replacement (3.6L LGX) 
  11. Install the front wheel drive half shaft. Front Wheel Drive Half Shaft Replacement - Right Side (AWD)Front Wheel Drive Half Shaft Replacement - Right Side (FWD)
  12. Install the three way catalytic converter. Three-Way Catalytic Converter Replacement (Bank 1)Three-Way Catalytic Converter Replacement (Bank 2)
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