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 MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 286 (REAR DRIVE AXLE)
2008 Pontiac Grand Prix Base
Section 286 (Rear Drive Axle)
2008 Pontiac Grand Prix BaseSECTION Section 286 (Rear Drive Axle)
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Diagnostic Starting Point - Locking/Limited Slip Rear Axle
- Diagnostic Starting Point - Rear Drive Axle
- DTC C0388
- Symptoms - Locking/Limited Slip Rear Axle
- Symptoms - Rear Drive Axle
- Rear Drive Axle Noises
- Noisy in Drive
- Noisy When Coasting
- Intermittent Noise
- Constant Noise
- Noisy on Turns
- Wheel Bearing Wear - Rear Drive Axle (Straight)
- Wheel Bearing Wear - Rear Drive Axle (Tapered)
- Rear Axle Lubricant Leak Diagnosis
- Locking Differential Diagnosis
- Electronic Rear Differential Lock Will Not Engage
- Electronic Rear Differential Lock Will Not Disengage
- Repair Instructions
- Rear Axle Lubricant Level Inspection
- Rear Axle Lubricant Replacement
- Vent Hose Replacement
- Rear Axle Housing Cover and Gasket Replacement
- Rear Axle Shaft Replacement
- Rear Axle Shaft Seal and/or Bearing Replacement
- Drive Pinion Flange/Yoke and/or Oil Seal Replacement
- Drive Pinion and Ring Gear Replacement
- Drive Pinion Bearings Replacement
- Differential Replacement
- Differential Side Bearings Replacement
- Rear Axle Replacement
- Rear Axle Housing Replacement
- Electronic Locking Differential Coil Lock Replacement
- Bearings Inspection
- Pinion and Ring Gear Inspection
- Rear Axle Housing Inspection
- Shims Inspection
- Pinion Depth Adjustment
- Differential Carrier Bearing Preload Adjustment
- Backlash Adjustment
- Gear Tooth Contact Pattern Inspection
- Notes
- Drive Pinion and Ring Gear Identification
- Gear Tooth Nomenclature
- Adjustments Affecting Tooth Contact
- Testing Procedure
- Correct Contact Pattern
- Drive Side Heel - Coast Side Toe Contact Pattern
- Drive Side Toe - Coast Side Heel Contact Pattern
- Drive Side Heel - Coast Side Heel Contact Pattern
- Drive Side Toe - Coast Side Toe Contact Pattern
- High Flank Contact Pattern
- Low Flank Contact Pattern
- Locking Differential Disassemble
- Locking Differential Cleaning and Inspection
- Locking Differential Adjustment
- Locking Differential Assemble
- Description and Operation
- Special Tools and Equipment
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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.