Use a pinion setting gauge in order to measure differential drive pinion
gear depth. The gauge provides a normal or zero pinion as a gauging reference.
- Install the J 21777-40
, the J 21777-42
, the J 21777-43
, and the J 21777-45
- Install the J 23597-11
.
- Install the J 21777-42
into the rear axle housing.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the drive
pinion gear setting gauge nut into the rear axle housing.
(Refer to
Rear Axle With Antilock Brake System (Drum Brakes)
Tighten
Tighten the differential drive pinion gear setting gauge nut to 2.3 N·m
(20 lb in).
- Rotate the J 23597-11
in order to seat the following components:
| • | The differential drive pinion gear outer bearing (2) |
| • | The differential drive pinion gear inner bearing (1) |
- Mount the J 8001
onto the J 23597-1
.
- Preload the dial indicator against the plunger about 1.27 mm
(0.050 in).
- Install the J 21777-45
onto the J 23597-11
.
Position this unit into the rear axle housing (10).
Refer to
Rear Axle With Antilock Brake System (Drum Brakes)
- Install the following components:
| • | The carrier bearing caps (3) |
| • | The bearing cap bolts/screws (2) |
Tighten
Tighten the differential carrier bearing cap bolt/screws (2) to 75 N·m
(55 lb ft).
- Use the following steps in order to measure the differential drive
pinion gear depth:
| 10.1. | Rotate the J 23597-1
slowly back and forth until the J 8001
reads the greatest deflection. |
The deflection is the point where the needle changes direction.
| 10.2. | At the point of deflection, set the J 8001
to zero. |
| 10.3. | Repeat the rocking action in order to verify the zero setting. |
| 10.4. | After obtaining the zero setting, rotate the J 23597-1
until the plunger no longer touches
theJ 23597-11
. |
This action provides the gauge reference of a zero or nominal drive
pinion gear.
| 10.5. | Use the following information in order to select the correct shim: |
| • | Record the J 8001
reading at the pointer position. |
| • | The required drive pinion gear shim thickness is equal to the J 8001
reading. |
| • | For example, if the pointer moved counterclockwise 1.70 mm (0.067
in) to a dial reading of 0.84 mm (0.033 in), a shim thickness of 0.84 mm
(0.033 in) is required. |
| • | Drive pinion gear shims are available in 0.03-0.94 mm
(0.001-0.037 in). |
| • | The thickness of each shim is etched on the flat surface of the shim. |
- Loosen the J 21777-43
.
- Remove all of the special tools from the rear axle housing.
- Remove the inner (1) and the outer (2) drive pinion gear bearings
from the rear axle housing.
- Install the correct drive pinion gear shim on the drive pinion
gear.
- Use the following steps in order to set the proper drive pinion
gear depth:
| 15.1. | Use the set-up dimension determined by the J 8001
as a starting point. |
| 15.2. | Perform a ring gear tooth pattern test in order to fine tune the
drive pinion gear depth. |
The test may indicate additional necessary drive pinion gear shim changes.
Refer to
Pinion and Ring Gear Inspection
.
- Install the following components:
| • | The drive pinion gear inner bearing |
| • | The drive pinion gear outer bearing |
- Assemble the differential case.
Refer to
Differential Case Assembly
.
- Measure the total preload at the drive pinion gear nut bearings.
The preload should measure within the following specifications:
| • | With new inner and outer drive pinion gear bearings and a new
drive pinion gear seal (6), the preload should measure 3.6-6.2 N·m
(32-55 lb in). |
| • | With used inner and outer drive pinion gear bearings and a new
drive pinion gear seal (6), the preload should measure 1.8-3.1 N·m
(16-28 lb in) when rotating with a new drive pinion gear
seal (6). |
| • | Refer to
Rear Axle With Antilock Brake System (Drum Brakes)
|
