Drivetrain - Differential Carrier Replacement Update
File In Section: 04 - Driveline AxleBulletin No.: 02-04-19-001
Date: December, 2002
SERVICE MANUAL UPDATE
Subject:
Revised Differential Carrier Assembly Replacement
Models:
2002 Chevrolet TrailBlazer
2002 GMC Envoy
2002 Oldsmobile Bravada
This bulletin is being issued to revise the Differential Carrier Assembly Replacement Procedure in the Front Drive Axle sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information
The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.
Removal Procedure
1. Remove the front tires and wheels. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
2. Remove the engine protection shield. Refer to Engine Protection Shield Replacement in Frame and Underbody.
3. Drain the engine of oil.
4. Drain the front drive axle. Refer to Lubricant Change.
5. Remove the front propeller shaft from the front axle.
6. Wrap the bearing caps with tape in order to prevent the loss of the roller bearings.
7. Remove the ABS wiring harness from the retainers.
8. Remove the brake hose retaining bolts.
9. Remove the front drive axle vent hose.
10. Remove the left and right upper ball pinch bolt and nut.
11. Remove the left and right upper shock module retaining nuts.
12. Remove the front stabilizer bar links from the frame. Refer to Stabilizer Shaft Link Replacement in Front Suspension.
13. Remove the shock module from the frame.
14. Remove the steering knuckle from the upper control arm.
15. Remove the left and right front wheel drive shafts from the front drive axle.
16. Relocate and secure the left and right front wheel drive shafts to the frame.
17. Using mechanics wire or hook, support the front shock modules and steering knuckle.
18. Remove the power steering gear assembly. Refer to Power Steering Gear Replacement in Power Steering System.
19. Remove the inner shaft from the front drive axle. Refer to Inner Axle Shaft Replacement-Front Drive Axle.
20. Remove the front drive axle from the oil pan.
21. Secure the front drive axle to the frame.
22. Remove the oil pan. Refer to Oil Pan Replacement in 4.2L Engine Mechanical.
23. Remove the front drive axle from the vehicle.
Installation Procedure
1. Install the front drive axle to the frame.
2. Secure the front drive axle to the frame.
3. Install the oil pan. Refer to Oil Pan Replacement in 4.2L Engine Mechanical.
4. Remove the front drive axle from the frame.
5. Install the front drive axle to the oil pan.
Notice:
Refer to Fastener Notice in Cautions and Notices.
6. Install the front drive axle mounting bolts.
Tighten
Tighten the front drive axle mounting bolts to 85 N.m (63 lb ft).
7. Install the inner axle to the front drive axle. Refer to Inner Axle Shaft Replacement-Front Drive Axle.
8. Install the power steering gear. Refer to Power Steering Gear Replacement in Power Steering System.
9. Remove the left and right front wheel drive shafts from the frame.
10. Remove the left, right shock module and steering knuckles from their supports.
11. Install the right and left front wheel drive shafts to the front drive axle.
12. Install the vent hose to the front drive axle.
13. Install the left and right shock modules to the frame.
14. Install the upper shock module retaining nuts.
Tighten
Tighten the upper shock module mounting bolts to 100 N.m (74 lb ft).
15. Install the steering knuckle to the upper control arm.
16. Install the upper ball joint pinch bolt and nut.
Tighten
Tighten the upper shock module mounting bolts to 40 N.m (30 lb ft).
17. Install the front stabilizer bar links to the frame. Refer to Stabilizer Shaft Link Replacement in Front Suspension.
18. Install the brake hose retaining bolts.
Tighten
Tighten the brake hose retaining bolt to 25 N.m (18 lb ft).
Disclaimer