Power Transfer Unit Cover Housing Cleaning and Inspection

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Power Transfer Unit Cover Housing

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Clean the power transfer unit case housing in solvent, air dry. Remove all residual input shaft seal material from the input shaft seal bore.
1	Power Transfer Unit Case Cover Housing Threaded Bolt Holes NOTE: Inspect for damage.
2	Power Transfer Unit Case Extension Housing Threaded Bolt Holes NOTE: Inspect for thread damage
3	Power Transfer Unit Case Extension Housing Sealing Surface NOTE: Inspect for scoring or damage.
4	Power Transfer Unit Case Cover Housing Sealing Surface NOTE: Inspect for scoring or damage.
5	Power Transfer Unit Case Cover Housing Sealing Surface NOTE: Inspect for pitting, excessive wear, or damage.
6	Power Transfer Unit Case Cover Housing Bearing Race NOTE: Inspect for brinnelling or excessive wear.
7	Power Transfer Unit Fill Plug Hole NOTE: Inspect for thread damage or sealing surface.