LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2018 >> Regal Preferred, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Power Transfer Unit/Transfer Case - AAM >> Repair Instructions - Off Vehicle >> Power Transfer Unit Case Assemble >> Power Transfer Unit Extension Housing Installation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Power Transfer Unit Extension Housing Installation

Fig 1: Power Transfer Unit Extension Housing Installation Tightening Sequence
GM3793523
Power Transfer Unit Extension Housing Installation

Callout Component Name
1 Power Transfer Unit Cover Housing Seal

Procedure

  1. Do NOT reuse the housing seal. Install a NEW seal during assembly.
  2. Inspect the extension housing and main housing seal surfaces to ensure they are clean and free of damage prior to assembly.
2 Power Transfer Unit Cover Housing
3 Power Transfer Unit Cover Housing Bolt [10x]
CAUTION:

Refer to Fastener Caution .

CAUTION:

This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Procedure

  1. Clean the internal threads (no residual pre-applied adhesive allowed)
  2. Use NEW bolts without pre-applied adhesive
  3. Apply threadlocker to the threads of the NEW bolts. Adhesives, Fluids, Lubricants, and Sealers 

Tighten in sequence 
  1. First Pass: 28 N.m (21 lb ft)
  2. Final Pass:90 degrees