Colorado 2WD V8-5.3L (2009)
Note: The mating surface of the ring gear and the differential case must be clean and free of burrs before installing the ring gear.
1. Install the ring gear to the differential case.
2. Install the new ring gear bolts.
Hand start each bolt to ensure that the ring gear is properly installed to the differential case.
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
3. Tighten the new ring gear bolts alternately and in stages, gradually pulling the ring gear onto the differential case.
Tighten the ring gear bolts in sequence to 120 Nm (89 lb ft).
4. Install the drive pinion bearing cups. Refer to Drive Pinion Bearings Replacement (8.6 Inch Axle) (See: Pinion Bearing/Service and Repair/Rear
Drive Axle)Drive Pinion Bearings Replacement (8.0 Inch Axle) (See: Service and Repair/Removal and Replacement/Rear Drive Axle/Drive
Pinion Bearings Replacement (8.0 Inch Axle)).
5. Determine the selective shim thickness for the pinion gear. Refer to Pinion Depth Adjustment (8.0 Inch Axle) (See: Service and Repair/Removal
and Replacement/Rear Drive Axle/Pinion Depth Adjustment (8.0 Inch Axle))Pinion Depth Adjustment (8.6 Inch Axle) (See: Service and
Repair/Removal and Replacement/Rear Drive Axle/Pinion Depth Adjustment (8.6 Inch Axle)).
6. Install the selective shim onto the pinion.
7. Install the inner pinion bearing onto the pinion. Refer to Drive Pinion Bearings Replacement (8.6 Inch Axle) (See: Pinion Bearing/Service and
Repair/Rear Drive Axle)Drive Pinion Bearings Replacement (8.0 Inch Axle) (See: Service and Repair/Removal and Replacement/Rear Drive
Axle/Drive Pinion Bearings Replacement (8.0 Inch Axle)).
8. Install a new collapsible spacer.
9. Lubricate the pinion bearings with axle lubricant. Refer to Fluid and Lubricant Recommendations (See: Maintenance/Service Intervals).
10. Install the pinion to the axle housing.
11. Install the outer pinion bearing.
12. Install a new pinion oil seal using the J 38694 .
13. Apply sealant, GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the splines of the pinion yoke.
