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.
Locking Differential Clutch Disc Assembly Assemble (9.75 Inch Axle)
- Apply axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115, to the surface of each disc.
- Assemble the right side or bell-end side clutch disc assembly as follows:
- Install the 1st non-carbon eared disc (3) to the side gear (1).
- Install the 1st splined disc (4).
- Install the 2nd non-carbon eared disc (5).
- Install the 2nd splined disc (6).
- Install the 3rd non-carbon eared disc (7).
- Install the guide clips (2) to the clutch discs (2-7).
Apply chassis grease, GM P/N 12377985 (Canadian P/N 88901242) or equivalent, to the guide clips in order to hold the clips in place on the disc ears.
Use the Manual With the Right Hardware
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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.
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