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Chevrolet Silverado / GMC Sierra. Manual - part 1402
Fig. 11: Identifying Double Edge Pitting
Courtesy of GENERAL MOTORS CORP.
Flaking of surface metal results from fatigue, usually at both edges of the race and rollers.
Replace the bearing. Clean all related parts. Replace the shaft if damaged.
Misalignment
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 12: Identifying Misalignment
Courtesy of GENERAL MOTORS CORP.
Outer misalignment due to a foreign object. Replace the bearing. Ensure races are properly
seated. Replace the shaft if the bearing operating surface is damaged.
Frettage
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 13: Identifying Frettage
Courtesy of GENERAL MOTORS CORP.
Corrosion set up by a small relative movement of parts with no lubrication. Replace the bearing.
Clean all the relative parts. Check the seals. Check for proper fit and lubrication. Replace the
shaft if damaged.
Smears
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 14: Identifying Smears
Courtesy of GENERAL MOTORS CORP.
Smearing of metal due to slippage. Slippage can be caused by poor fits, lack of lubrication,
overheating, overloads or handling damage. Replace the bearing. Clean all the related parts.
Check for proper fit and lubrication.
WHEEL BEARING WEAR - REAR DRIVE AXLE (TAPERED)
Tapered Roller Bearing Diagnosis
Consider the following factors when diagnosing bearing condition:
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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