Power Transfer Unit Extension Housing Installation

Fig 1: Power Transfer Unit Extension Housing Tightening Sequence

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
1	Power Transfer Unit Cover Housing Seal Procedure Inspect the extension housing and main housing seal surfaces to ensure they are clean and free of damage prior to assembly. Do NOT reuse the housing seal. Install a NEW seal during assembly.
2	Power Transfer Unit Extension Housing
3	Power Transfer Unit Extension 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 Clean the internal threads (no residual pre-applied adhesive allowed) Use brand NEW bolts / screws without pre-applied adhesive Apply threadlocker to the threads of the NEW bolts. Adhesives, Fluids, Lubricants, and Sealers Tighten in sequence First Pass: 28 N.m (21 lb ft) Final Pass: 90 degrees

Callout

Component Name

Power Transfer Unit Cover Housing Seal

Procedure

Inspect the extension housing and main housing seal surfaces to ensure they are clean and free of damage prior to assembly.
Do NOT reuse the housing seal. Install a NEW seal during assembly.

Power Transfer Unit Extension Housing

Power Transfer Unit Extension 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

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

Tighten in sequence

First Pass: 28 N.m (21 lb ft)
Final Pass: 90 degrees