| DEFINITION: A noise heard in the rear axle during all driving conditions. This noise may increase or decrease in volume based on different driving maneuvers and speeds. |
| Excessive ring gear runout |
Replace the ring gear. Differential Ring and Pinion Gear Replacement (G86)Differential Ring and Pinion Gear Replacement (G96) |
| Worn pinion or ring gear |
Replace the pinion and the ring gear. Differential Ring and Pinion Gear Replacement (G86)Differential Ring and Pinion Gear Replacement (G96) |
| Worn pinion splines |
Replace the pinion. Differential Ring and Pinion Gear Replacement (G86)Differential Ring and Pinion Gear Replacement (G96) |
| Excessive pinion end play |
Adjust the pinion end play. Pinion Depth Adjustment (G86 9.5 Inch Axle)Pinion Depth Adjustment (G86 9.76 Inch Axle)Pinion Depth Adjustment (G96) |
| Incorrect differential bearing preload |
Adjust the differential bearing preload. Differential Carrier Bearing Preload Adjustment (G86)Differential Carrier Bearing Preload Adjustment (G96) |
| Incorrect backlash |
Adjust the pinion and ring gear backlash. Backlash Adjustment (G86)Backlash Adjustment (G96) |
| Worn pinion bearings |
Replace the pinion bearings.
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| Worn differential bearings |
Replace the differential bearings. Differential Bearing Replacement (G86)Differential Bearing Replacement (G96) |
| Bent axle shaft |
Replace the axle shaft.
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| Worn axle housing |
Replace the axle housing. Rear Axle Housing Replacement (G86)Rear Axle Housing Replacement (G96) |
| Low oil level |
Fill the fluid level to specifications with the proper lubricant. Rear Axle Lubricant Level Inspection (G86)Rear Axle Lubricant Level Inspection (G96) |
| Wrong or poor grade oil |
Drain and refill the system with the proper lubricant. Rear Axle Lubricant Replacement (G86)Rear Axle Lubricant Replacement (G96) |