Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 90

4A2–18

DIFFERNTIAL (REAR)

14. Set the dial indicator to “0”. Place it on the mounting

post of the gauging arbor with the contact button
touching the indicator pad.
Force the dial indicator downward until the needle has
made a half turn clockwise. Tighten down the dial
indicator in this position.

425RS020

Legend

(1) Dial Indicator
(2) Ganging Arbor
(3) Plunger
(4) Gaug Plate

15. Position the plunger on the gauge plate. Move the

gauging arbor slowly back and forth and locate the
position at which the dial indicator shows the greatest
defection. At this point, once again set the dial
indicator to “0”.
Repeat the procedure to verify the “0” setting.

425RS021

16. After the ZERO setting is obtained, rotate the gauging

arbor until the dial indicator rod does not touch the
gauging plate.
Record the number the dial indicator needle points to.

425RS022

Legend

(1) Example=Dial indicator reading of 0.085

17. Record the pinion depth code on the head of the drive

pinion.
The number indicates a necessary change in the
pinion mounting distance. A plus number indicates
the need for a greater mounting distance (which can
be achieved by decreasing the shim thickness). A
minus number indicates the need for a smaller
mounting distance (which can be achieved by
increasing the shim thickness). If examination
reveals pinion depth code “0”, the pinion is “nominal”.

425RS023

DIFFERENTIAL (REAR)

4A2–19

18. Select the shim using the chart;

Dial Indicator
Reading

Marking (inches)

Reading 
(inches)

+3

+2

+1

0

–1

–2

–3

0.027

 

 

 

 

 

 

0.030

0.028

 

 

 

 

 

0.030

0.031

0.029

 

 

 

 

0.030

0.031

0.032

0.030

 

 

 

0.030

0.031

0.032

0.033

0.031

 

 

0.030

0.031

0.032

0.033

0.034

0.032

 

0.030

0.031

0.032

0.033

0.034

0.035

0.033

0.030

0.031

0.032

0.033

0.034

0.035

0.036

0.034

0.031

0.032

0.033

0.034

0.035

0.036

0.037

0.035

0.032

0.033

0.034

0.035

0.036

0.037

0.038

0.036

0.033

0.034

0.035

0.036

0.037

0.038

0.039

0.037

0.034

0.035

0.036

0.037

0.038

0.039

0.040

0.038

0.035

0.036

0.037

0.038

0.039

0.040

0.041

0.039

0.036

0.037

0.038

0.039

0.040

0.041

0.042

0.040

0.037

0.038

0.039

0.040

0.041

0.042

0.043

0.041

0.038

0.039

0.040

0.041

0.042

0.043

0.044

0.042

0.039

0.040

0.041

0.042

0.043

0.044

0.045

0.043

0.040

0.041

0.042

0.043

0.044

0.045

0.046

0.044

0.041

0.042

0.043

0.044

0.045

0.046

0.047

0.045

0.042

0.043

0.044

0.045

0.046

0.047

0.048

0.046

0.043

0.044

0.045

0.046

0.047

0.048

0.049

0.047

0.044

0.045

0.046

0.047

0.048

0.049

0.050

0.048

0.045

0.046

0.047

0.048

0.049

0.050

0.051

0.049

0.046

0.047

0.048

0.049

0.050

0.051

0.052

0.050

0.047

0.048

0.049

0.050

0.051

0.052

0.053

0.051

0.048

0.049

0.050

0.051

0.052

0.053

 

0.052

0.049

0.050

0.051

0.052

0.053

 

 

0.053

0.050

0.051

0.052

0.053

 

 

 

0.054

0.051

0.052

0.053

 

 

 

 

0.055

0.052

0.053

 

 

 

 

 

0.056

0.053

 

 

 

 

 

 

4A2–20

DIFFERNTIAL (REAR)

19. Remove bearing caps and depth gauging tools.
20. Install the correct pinion shim and inner oil slinger

onto pinion.

NOTE: Do not install pinion gear into housing at this time.

21. If the exciter ring was removed, install the new exciter

ring onto the differential case by pressing using the
ring gear as a pilot.

425RS047

22. Install ring gear(1) to the differential case(2)

425RW021

23. Install new ring gear bolts.

D

Tighten the ring gear bolts alternately in stages,
gradually pulling the ring gear onto the differential
case.

Tighten the ring gear bolts in sequence
Torque: 108 N·m (80 lb ft)

NOTE: Discard used bolts and install new ones.

415RS016

Side Bearing Preload Adjustment

1. The side bearing preload adjustment must be made

before installing the pinion.

2. The side bearing preload is adjusted by changing the

thickness of both the left and right shims equally.  This
maintain the original backlash.

3. Install master side bearings J–39836 onto the case.

Remove all nicks, burrs, dirt etc., from the hubs to
allow the master bearings to rotate freely.

425RW026

DIFFERENTIAL (REAR)

4A2–21

4. Assemble the differential case into the housing (less

pinion). Install bearing caps and finger tight bolts.
Mount a dial indicator with a magnetic base to the
housing and indicate on the flange or head of screw.
Force the differential assembly as far as possible in
the dirction towards the indicator.
With force still applied, set indicator at zero(0).

NOTE: Dial indicator set should be capable of a minimum
travel of 5.08 mm (0.2 in).

425RS107

5. Force the differetial assembly as far as it will go in the

opposite direction. Repeat these steps until the same
reading is obtained.

6. RECORD THE READING OF THE INDICATOR.

This amount, in shims, will be included in the final
assembly shim stack to establish side bearing
preload and ring gear and pinion backlash.

7. After marking sure the readings are correct, remove

the indicator and differetial assembly from the
housing.

Pinion Installation

D

The bearing cups should have been installed in Pinion
Depth Adjustment in this section.

1. Place the shim(1) and inner oil slinger(2) on the pinion

gear, then install the pinion inner bearing(3) using
installer J–42828.

425RW023

D

Drive the bearing until the bearing cone seats on the
pinion shims.

2. Install a new collapsible spacer.

D

Lubracate the pinion bearings with axle lublicant.

3. Install pinion to the axle housing.
4. Install outer pinion bearing onto the pinion.

D

Hold the pinion forward from inside the case while
driving the bearing onto the pinion.

5. Install oil seal slinger.
6. Install pinion oil seal using installer J–37263.
7. Install the pinion flange to the pinion by tapping it with

a rawhide hammer until a few threads show through
the pinion flange.

8. Install pinion washer and a new nut  while holding the

pinion flange with flange holder J–8614–01.

D

Tighten the nut until the pinion end play is just taken
up. Rotate the pinion while tightening the nut to seat
the bearings.

Torque:217-678 N·m (160-500 lb ft)

Once there is no end play in the pinion, the preload
torque should be checked.

D

Remove flange holder J–8614–01. Using an
inch-pound torque wrench, check the pinion
preload by rotating the pinion with the wrench.