For 1990-2009 cars

#### Special Tools

DT-48254 Rear-Wheel Drive Shaft Seal Installer

### Disassemble Procedure

1. Place a drain pan below the rear drive module.
2. Remove the drain plug from the bottom of the rear drive module and remove the fill plug from the left side of the rear drive module.
3. Drain the fluid.
4. Remove the differential carrier assembly side bracket.
5. Disconnect the coupling control module connector and remove the coupling control module from the rear drive module housing.
6. Remove and discard the pinion flange nut.
7. Remove the pinion flange.
8. Remove the clutch coupling assembly, housing, and seal.
9. Remove the differential carrier assembly side cover and seal.
10. Remove the rear-wheel drive shaft seals.

### Assembly Procedure

Caution: Refer to Fastener Caution in the Preface section.

1. Install the differential carrier assembly side cover and seal. Tighten the differential carrier assembly side bracket securing bolts to 29 N·m (21 lb ft).
2. Install the rear-wheel drive shaft seal using the DT-48254 installer .
3. Install the clutch coupling assembly, housing, and seal. Tighten the clutch coupling assembly housing securing bolt to 26 N·m (19 lb ft).
4. Install the pinion flange.
5. Install the new pinion flange nut and tighten to 203 N·m (150 lb ft).
6. Install the coupling control module onto the rear drive module housing and connect the coupling control module connector. Tighten the coupling control module securing bolt to 10 N·m (71 lb ft).
7. Install the differential carrier assembly side bracket and tighten the bolt to 29 N·m (21 lb ft).
8. Thoroughly clean the drain plug threads and apply thread sealer, GM P/N 12346004 (Canadian P/N 10953480), to the plug threads. Tighten the plug to 42 N·m (31 lb ft).
9. Fill the RDM with lubricant until the lubricant overflows through the fill plug hole.
10. Thoroughly clean the fill plug threads and apply thread sealer, GM P/N 12346004 (Canadian P/N 10953480), to the plug threads.
11. Install the fill plug and tighten to 42 N·m (31 lb ft).