SPECIFICATIONS
| DESCRIPTION | SPECIFICATION |
|---|---|
| Axle Ratio | 3.21, 3.55, 3.92, 4.10 |
| Pinion Flange Runout | 0.050 mm (0.002 in.) |
| Ring Gear Diameter | 235 mm (9.25 in.) |
| Ring Gear Backlash | 0.12 - 0.20 mm (0.005 - 0.008 in.) |
| Pinion Torque To Rotate - New Bearings | 1.9 - 2.5 N.m (17 - 22 in. lbs.) |
| Pinion Torque To Rotate - Original Bearings | 1 - 1.7 N.m (10 - 15 in. lbs.) |
| Fill Level - From Bottom of Fill Hole | 3 mm (1/8 in.) ± 3 mm (1/8 in.) |
AXLE
| DESCRIPTION | N.m | Ft. Lbs. | In. Lbs. |
|---|---|---|---|
| Drain and Fill Plugs | 70 | 52 | |
| Differential Cover Bolts | 44 | 32 | |
| Bearing Cap Bolts | 136 | 100 | |
| Ring Gear Bolts | 225 | 166 | |
| Pinion Nut Minimum | 285 | 210 | |
| Adjuster Lock Screw | 11 | 97 | |
| Backing Plate Bolts | 102 | 75 | |
| Pinion Mate Shaft Lock Screw | 26 | 19 |
TORQUE
Scheme 324
Scheme 325
Scheme 326
Scheme 327
Scheme 328
Scheme 329
Scheme 330
Scheme 331
Scheme 332
Scheme 333
- With vehicle in neutral, position vehicle on hoist. Refer to «Hoisting , Standard Procedure»(ref-457775-S03796115192012030200000) .
- Remove the rear wheels.
- Disconnect the rear wheel speed sensor electrical connector (3).
- Remove the mounting bolt (1) from the sensor (4).
- Remove the wheel speed sensor (4) from the brake caliper adapter (2). NOTE: Do not allow brake hose to support caliper assembly. NOTE: Mechanics wire can be used to support the caliper and adapter plate assemblies.
- Remove the rear caliper adapter plate bolts (1) from both sides and position the calipers (2) aside.
- Loosen clamp (2) and disconnect the axle vent hose (1) from the axle (3).
- Remove the rear driveshaft. Refer to «SHAFT, Drive, Rear Light Duty , Removal»(ref-457778-S35273603822012030200000) or «SHAFT, Drive, Rear Heavy Duty , Removal»(ref-457778-S33381732642012030200000) .
- Pull the park brake cable spring (1) back. NOTE: A 13mm line wrench can be used to compress the cable tabs. Insert while spring is pulled back and rotate the wrench to compress the tabs.
- Compress the cable tabs on each cable end fitting at the brake cable support plate (2).
- Remove the park brake cable (3) from the brake cable support plate (2).
- Remove the upper park brake cable bolt (1) from the rear axle (2).
- Remove the park brake bolt (1) on the upper control arm bracket (2).
- Position the park brake cable away from the rear axle.
- Remove the stabilizer bar bolts (1) and position the stabilizer bar (2) aside or hang from wire off of the spare tire.
- Position a lift under the axle and secure the axle to the lift.
- Remove both lower shock absorber bolts (1) and position the shock absorbers (2) away from the axle.
- Remove the track bar bolt (1) and position the track bar (2) away from the rear axle.
- Remove both the upper control arm to rear axle bolts (1), discard nut and bolt, and position the upper control arms (3) away from the axle.
- Remove both the lower control arm to rear axle bolts (2) , discard nut and bolt, and position the lower control arms (4) away from the axle.
- Slightly lower the rear axle assembly and remove the rear springs.
- Remove the rear axle from the vehicle.
Scheme 334
Note. All suspension torques should be made with the full vehicle weight on the ground being supported by the tires.
- Position the spring (3) and isolator (2) on the axle and align into the spring upper pocket.
- Carefully raise the rear axle into place.
- Position both the lower control arms (4) into the rear axle brackets and loosely install the new bolts (2) with new nuts.
- Position both the upper control arms (3) into the rear axle brackets and loosely install the new bolts (1) with new nuts.
- Position the rear track bar (2) to the rear axle bracket and loosely install the bolt (1).
- Position both the rear shock absorbers (2) to the axle brackets and loosely install the rear shock absorber bolts (1).
- Remove the axle lift. NOTE: The stabilizer bar must be centered with equal spacing on both sides.
- Position the stabilizer bar (2) to the rear axle and install and tighten the bolts (1) to 65 N.m (48 ft. lbs.).
- Position the park brake cable back to the rear axle.
- Install the park brake cable bolt (1) on the upper control arm bracket and tighten to 22 N.m (16 ft. lbs.).
- Install the upper park brake cable bolt (1) to the rear axle (2) and tighten to 22 N.m (16 ft. lbs.).
- Install the rear cable (3) into the tensioner rods behind the rear of the brake assemblies.
- Pull the park brake cable springs (1) back until the cable end fitting tabs lock into place. NOTE: Pull on the cable to ensure that it is locked into place.
- Install the rear driveshaft. Refer to «SHAFT, Drive, Rear Light Duty , Installation»(ref-457778-S10067659062012030200000) or «SHAFT, Drive, Rear Heavy Duty , Installation»(ref-457778-S28269825252012030200000) .
- Connect the axle vent hose (1) and clamp (2) to the axle (3).
- Position the calipers (2) back onto the brake rotors and install and tighten the adapter plate bolts (1) to 135 N.m (100 ft.lbs).
- Position the rear wheel speed sensors (4) to the brake caliper adapters (2).
- Install the mounting bolts (1) to the wheel speed sensor (4) and tighten to 24 N.m (18 ft.lbs).
- Connect the rear wheel speed sensor electrical connectors (3).
- Install the rear wheels. Refer to «Wheels , Standard Procedure»(ref-457774-S22159730232012030200000) .
- Lower the vehicle.
- Tighten the upper (1) and lower control arm (2) to 300 N.m (221 ft. lbs.).
- Tighten the track bar mounting bolt to 155 N.m (114.5 ft. lbs.).
- Tighten shock bolt (1) to 136 N.m (100.5 ft. lbs.).