(8.25 S4WD and 9.25 Axles)
Differential Carrier Assembly - Final Assembly (8.25 S4WD and 9.25 Axles)^ Tools Required
- J 8092 Universal Driver Handle - 3/4 in - 10
- J 22833 Housing Driver Gear Installer
- J 33842 Pilot Bearing Installer
- J 36600 Output Shaft Seal Installer
- J 36609 Axle Tube Bearing Installer
- J 36616 Axle Mount Bushing Remover/lnstaller
1. Bend the differential adjuster nut lock tabs over the differential adjuster nut sleeves, 8.25 inch axle -both sides, 9.25 inch axle - right side.
2. Install the differential adjuster nut lock, 9.25 inch axle - left side.
Notice: Refer to Fastener Notice in Service Precautions.
3. Install the differential adjuster nut lock bolt.
^ Tighten the differential adjuster lock nut bolt to 20 Nm (15 ft. lbs.).
4. Remove the differential carrier assembly bolts.
5. Remove the right differential carrier case half.
6. Clean the sealing surface of each half of the differential carrier case and the inner axle housing to differential carrier assembly.
The surfaces must be clean of all the grease and the oil.
7. Apply a bead of sealer GM P/N 1052942 (Canadian P/N 10953466), or equivalent, to 1 differential carrier case half sealing surface.
8. Install the right differential carrier case half.
9. Install the differential carrier case bolts.
^ Tighten the differential carrier case bolts to 47 Nm (35 ft. lbs.).
10. Lubricate the clutch shaft pilot bearing with axle lubricant. Refer to Fluid and Lubricant Recommendations.
11. Install the clutch shaft pilot bearing using the J 33842.
12. Install the clutch shaft to the differential carrier.
13. Install the vent hose connector.
^ Tighten the vent hose connector to 28 Nm (21 ft. lbs.).
14. Install the new left side axle shaft seal using the J 36600, 8.25 inch axle, or the J 22833, 9.25 inch axle.
15. Install the new left side inner axle shaft retainer ring.
16. Install the left side inner axle shaft by doing the following:
16.1. Install the left side inner shaft into the differential carrier assembly until the inner shaft is seated against the differential side gear.
16.2. While holding the inner shaft against the differential side gear, turn the inner shaft in order to align the splines of the inner shaft with the splines on the differential side gear.
16.3. Drive the inner shaft into the differential case side gear using a soft-faced mallet until the retaining ring on the inner shaft is fully seated within the groove in the differential case side gear. Pull back on the inner shaft to ensure that the inner shaft is properly retained in the differential case side gear.
17. Install the right side inner shaft bearing into the inner shaft housing by performing the following steps:
17.1. Install the inner axle shaft housing into a vise.
Clamp only on the mounting flange of the inner axle shaft housing.
17.2. Install the bearing with the square shoulder in using the J 36609 (1) and the J 8092 (2).
18. Install the new inner shaft seal using the J36600, 8.25 inch axle, or the J 22833,9.25 inch axle.
19. Install the inner axle shaft into the inner shaft housing.
Carefully tap the inner axle shaft into place with a soft-faced mallet.
20. For the 8.25 inch axle, assemble the following components into the inner shaft housing:
Important: Use chassis grease in order to hold the thrust washer in place.
20.1. Install the thrust washer (5).
Ensure the tabs on the thrust washer are aligned with the slots in the inner shaft housing (4).
20.2. Install the new retainer ring (7) into the clutch gear (6).
20.3. Install the clutch gear (6) onto the inner axle shaft (1).
Drive the clutch gear into place with a plastic hammer.
20.4. Determine the clutch gear shim thickness. Refer to Inner Axle Shaft Shim Adjustment.
20.5. Install the clutch gear shim (9).
20.6. Install the clutch sleeve (8).
20.7. Install the clutch fork assembly (11).
20.8. Install the clutch fork inner spring (10).
21. For the 9.25 inch axle, install the following components into the inner shaft housing:
Important: Use chassis grease in order to hold the thrust washer in place.
21.1. Install the thrust washer (5).
Ensure the tabs on the thrust washer are aligned with the slots in the inner shaft housing.
21.2. Install the second thrust washer (6) into the inner axle shaft housing.
21.3. Install the new retainer ring (7) onto the inner axle shaft (1).
21.4. Determine the clutch gear shim thickness. Refer to Inner Axle Shaft Shim Adjustment.
21.5. Install the clutch gear shim (9).
21.6. Install the clutch sleeve (8).
21.7. Install the clutch fork assembly (11).
21.8. Install the clutch fork inner spring (10).
22. Apply sealant GM P/N 1052942 (Canadian P/N 10953466) or equivalent, to the inner shaft housing to differential carrier sealing surface.
23. Install the inner shaft housing to the differential carrier assembly case.
24. Install the inner shaft housing bolts.
^ Tighten the inner shaft housing bolts to 40 Nm (30 ft. lbs.).
25. Install the drain plug and the washer.
26. Install the fill plug and the washer.
^ Tighten the drain plug and the fill plug to 33 Nm (24 ft. lbs.).
27. Install the front drive axle actuator.
Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the front axle actuator.
^ Tighten the front drive axle actuator to 20 Nm (15 ft. lbs.).
28. Install the lower differential carrier assembly bushing by performing the following steps:
28.1. Install the J 21474-18 (1), the thrust bearing (2), the J 36616-2 (3), the J 36616-1 (4), and the forcing screw (5) as shown.
28.2. While holding the forcing screw, slowly Tighten the J 21474-18 until the bushing has stopped against the step on the bushing and is centered within the differential carrier assembly bushing bore.
29. Install the upper differential carrier assembly bushing by performing the following steps
29.1. Install the J 21474-18 (1), the thrust bearing (2), the J 36616-2 (3), the J 36616-1 (4), and the forcing screw (5) as shown.
29.2. While holding the forcing screw, slowly Tighten the J 21474-18 until the bushing has stopped against the step on the bushing and is centered within the differential carrier assembly bushing bore.