WHEEL BEARING ROTATION STARTING TORQUE AND AXIAL PLAY CHECK
Required Special Tools
- MB990998, MB991017: Front Hub Remover and Installer
- MB990326: Preload Socket
- MB990685: Torque Wrench
Scheme 1
Scheme 2
- Tighten special tools MB991000 (MB990998) and MB991017 to the specified torque. Tightening torque: 225 +/- 25 N.m (166 +/- 18 ft-lb)
- Rotate the rear hub in order to seat the bearing.
- Hold the rear wheel hub assembly in a vice by way of wooden block.
- Measure the wheel bearing rotation starting torque by using special tools MB990326 and MB990685. Limit: 1.0 N.m (0.74 ft-lb)
- If the rotation starting torque is not within the limit range while the nut is tightened to 225 +/- 25 N.m (166 +/- 18 ft-lb) and replace the front wheel bearing assembly. If there is any signs of binding or tight spots when the wheel bearing turns, replace it.
- Measure to determine whether the wheel bearing axial play is within the specified limit or not. Limit: 0.05 mm (0.002 inch)
- If the play is not within the limit range while the nut is tightened to 225 +/- 25 N.m (166 +/- 18 ft-lb), replace the rear wheel hub assembly.
Scheme 3
>> E << DRIVE PINION TURNING TORQUE ADJUSTMENT/OIL SEAL INSTALLATION
Adjust the drive pinion turning torque by the following procedures
Scheme 4
Scheme 5
Scheme 6
Scheme 7
Scheme 8
Scheme 9
Scheme 10
Scheme 11
Scheme 12
Scheme 13
- Insert the drive pinion into the differential carrier, and then install the following parts in sequence from the carrier rear side: drive pinion spacer, drive pinion front shim, drive pinion front bearing inner race and companion flange. NOTE: Do not install the oil seal.
- Tighten the companion flange self-locking nut to the specified torque while holding the companion flange with special tool MB990850. Tightening torque: 186 +/- 29 N.m (137 +/- 21 ft-lb) CAUTION: There should be no gear oil adhered to the bearing.
- Use special tools MB990685 and MB990326 to measure the drive pinion turning torque (without the drive pinion oil seal). Standard value
- If the drive pinion turning torque is not within the standard value, adjust the turning torque by replacing the drive pinion front shim(s) or the drive pinion spacer. NOTE: When selecting the drive pinion front shims, if the number of shims is large, reduce the number of shims to a minimum by selecting the drive pinion spacers. Select the drive pinion spacer from the following two types.
- Remove the companion flange and drive pinion again. Then insert the drive pinion front bearing inner race into the differential carrier. Use special tool MB990727 to press-fit the drive pinion oil seal.
- Install the drive pinion assembly and companion flange with the mating marks properly aligned. Tighten the companion flange self-locking nut to the specified torque while holding the companion flange with special tool MB990850. Tightening torque: 186 +/- 29 N.m (137 +/- 21 ft-lb)
- Use special tools MB990685 and MB990326 to measure the drive pinion turning torque (with drive pinion oil seal) to verify that the drive pinion turning torque complies with the standard value. Standard value
- If the turning torque is not within the standard value, check the tightening torque of the companion flange self-locking nut, and the installation of the oil seal.
Scheme 14
- Clean the drive gear attaching bolts.
- Remove the adhesive adhered to the threaded holes of the drive gear by turning the tap (M10 x 1.25). Clean the threaded holes by applying compressed air.
- Apply 3M™ stud locking 8730, 8731 or equivalent to the threaded holes of the drive gear.
- Install the drive gear onto the limited slip differential case with the mating marks properly aligned. Tighten the drive gear attaching bolts to the specified torque in a diagonal sequence. Tightening torque: 84 +/- 4 N.m (62 +/- 3 ft-lb)
Scheme 15
FASTENER TIGHTENING SPECIFICATIONS
| ITEM | SPECIFICATION |
|---|---|
| Rear wheel hub assembly, drive shaft assembly | |
| Drive shaft nut | 225 ± 25 N.m (166 ± 18 ft-lb) |
| Rear wheel hub assembly mounting bolt | 81 ± 7 N.m (60 ± 4 ft-lb) |
| Brake caliper mounting bolt | 54 ± 5 N.m (40 ± 4 ft-lb) |
| Backing plate mounting nut | 118 ± 9 N.m (87 ± 4 ft-lb) |
| Knuckle | |
| Self locking nut (Trailing arm connection) | 81 ± 6 N.m (60 ± 4 ft-lb) |
| Self locking nut (Lower arm connection) | 88 ± 10 N.m (65 ± 7 ft-lb) |
| Self locking nut (Toe control arm connection) | 81 ± 6 N.m (60 ± 4 ft-lb) |
| Self locking nut (Upper arm connection) | 81 ± 6 N.m (60 ± 4 ft-lb) |
| Differential carrier assembly | |
| Propeller shaft and differential companion flange connecting nut | 32 ± 2 N.m (24 ± 1 ft-lb) |
| Differential mount bracket bolt | 88 ± 10 N.m (65 ± 7 ft-lb) |
| Differential mount bracket to differential support member connecting bolt | 120 ± 10 N.m (89 ± 6 ft-lb) |
| Differential support member mounting bolt | 88 ± 10 N.m (65 ± 7 ft-lb) |
| Differential support arm to differential carrier mounting bolt | 73 ± 12 N.m (54 ± 9 ft-lb) |
| Differential support arm mounting nut | 73 ± 12 N.m (54 ± 9 ft-lb) |
| Rear crossmember mounting bolt | 88 ± 10 N.m (65 ± 7 ft-lb) |
| Toe control bar mounting bolt | 69 ± 9 N.m (51 ± 7 ft-lb) |
| Differential cover bolt | 36 ± 5 N.m (26 ± 4 ft-lb) |
| Drain plug | 64 ± 4 N.m (47 ± 3 ft-lb) |
| Drive gear and limited slip differential case mounting bolt | 84 ± 4 N.m (62 ± 3 ft-lb) |
| Companion flange self-locking nut | 186 ± 29 N.m (137 ± 21 ft-lb) |
| Filler plug | 49 ± 9 N.m (37 ± 6 ft-lb) |
| Bearing cap bolt | 37 ± 2 N.m (27 ± 1 ft-lb) |
Fastener Tightening Specifications
GENERAL SPECIFICATIONS
| ITEM | Specification | ||
|---|---|---|---|
| REAR AXLE | |||
| Wheel bearing | Type | Unit ball bearing (Double-row angular contact ball bearing) | |
| Drive shaft Joint | Type | Outer | EBJ |
| Inner | TJ | ||
| Length (joint to joint) x diameter mm (in) | Left | 485.6 x 25 (19.1 x 1.0) | |
| Right | 575.5 x 25 (22.7 x 1.0) | ||
| DIFFERENTIAL | |||
| Reduction gear type | Hypoid gear | ||
| Reduction ratio | 3.307 | ||
| Differential gear type (Type x number of gears) | Side gear | Straight bevel gear x 2 | |
| Pinion gear | Straight bevel gear x 4 | ||
| Number of teeth | Drive gear | 43 | |
| Drive pinion | 13 | ||
| Bearings (Outside diameter) x Inside diameter mm (in) | Side | 72.0 x 25.0 (2.83 x 1.0) | |
| Front | 62.0 x 25.0 (2.44 x 1.0) | ||
| Rear | 72.0 x 25.0 (2.83 x 1.0) | ||
REAR AXLE GENERAL SPECIFICATIONS
Note. The wheel bearing is part of the hub, therefore its size is not listed here.
