Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2023TRAVERSE RS, 4WDREPAIR AND DIAGNOSISTRANSMISSIONTRANSFER CASEPOWER TRANSFER UNIT - GKN 761REPAIR INSTRUCTIONS - OFF VEHICLEPOWER TRANSFER UNIT CASE CLEANING AND INSPECTIONPOWER TRANSFER UNIT CASE HOUSING CLEANING AND INSPECTION

2023 Chevrolet Traverse RS, 4WD

Power Transfer Unit Case Housing Cleaning and Inspection

2023 Chevrolet Traverse RS, 4WDSECTION Power Transfer Unit Case Housing Cleaning and Inspection

Fig 1: Identifying Power Transfer Unit Case Housing Cleaning And Inspection Areas

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. The case halves, internal gears and bearings are not serviceable components. If damage is present, the power transfer unit must be replaced as an assembly.
1	Power Transfer Unit Housing - Model Dependent NOTE: Inspect for damage to case.
2	Power Transfer Unit Case Housing Sealing Surface NOTE: Inspect the input shaft seal ID bore for scoring or damage. Inspect the face seal / O-ring seal OD sealing surface for scoring or damage.
3	Power Transfer Unit Case Vent Connector Hole
4	Power Transfer Unit Case Housing Threaded Bolt Holes NOTE: Repair any damaged threads.
5	Power Transfer Unit Case Housing Sealing Surface NOTE: Inspect for scoring or damage.
6	Power Transfer Unit Case Housing Bearing Races NOTE: Inspect for brinnelling or excessive wear.
7	Power Transfer Unit Case Housing Sealing Surface NOTE: Inspect for scoring or damage.
8	Power Transfer Unit Case Housing Threaded Bolt Holes NOTE: Inspect for thread damage
9	Power Transfer Unit Case Housing Threaded Bolt Holes
10	Power Transfer Unit Drain Plug Hole NOTE: Inspect for thread damage

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.