GMC S Series 1994 Repair Manual Download

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Thrust Block Clearance Adjustment

Install or Connect (Figures 1, 6, and 7)

+4-

1. Left thrust washer (13) to the differential.

2.  Cam  unit  to  the  differential.
3.  Right  side  gear  thrust  washer  (8)  to  the  differential.
4.  Clutch  plates  with  guide  clips  to  the  differential.

• Assemble alternately as shown in figure 1.

5. Right side gear (10) to the differential.
6. Pinion shaft (18) and lock screw (3). Insert a large

tapered tool, like a screwdriver, firm ly between

each side gear and the pinion shaft.

7. A one to two inch telescoping gage between the

side gear faces, not the gear teeth.

Measure

1. Measure the side gear spread (figure 6).

2. Remove the telescoping gage.
3. Measure the telescoping gage with a microme

ter.

4. Measure the original thrust block at the outer

corner with a micrometer (figure 7).

Adjust

• If the thrust block thickness is not 0.000 to 0.1524

mm (0.000 to 0.006 inch) less than the side gear
spread, adjust the clearance by:

A. Selecting a new thrust block the correct size to

o b ta in 0 .0 0 0 to 0 .1 5 2 4 mm (0 .0 0 0 to
0.006-inch) clearance.

B. Reshimming the right and/or left clutch plates.

The backlash must be rechecked and adjusted
to specification if necessary.

ASSEMBLY OF THE DIFFERENTIAL

Install or Connect (Figures 1 and 8)

1. Left side gear thrust washer (13).

2.  Cam  unit.  Refer  to  “ Cam  Unit  Assembly.”
3.  Right  side  gear  thrust  washer  (8).
4.  Right  clutch  plates  with  guide  clips  (19).

• Assemble alternately as shown in figure 1.

5. Right side gear (10).
6. Thrust block (17), pinion thrust washer (6), and

pinion gear (7).

A. Place the pinion gears into the differential 180

degrees apart.

B. Rotate the gears and thrust block into position.

C. The open side of the thrust block must face the

small window opening.

7. Pinion shaft (18).
8. A new lockscrew (3). Install finger tight.

• Tighten to specifications after installed in the

vehicle.

9. Governor assembly (11) and latching bracket (5).

• The straight end of the latching bracket spring

must be over and outside the governor assem
bly shaft (figure 8).

10. Stop pin (2) (9 1/2-inch only):

• Press the pin flush with the case.

11. Governor bushing (4).

• Use the bushing with a straight hole, not a

tapered hole.

• Press the bushing in far enough to give 0.1016

to 0.020 mm (0.004 to 0.020 inch) shaft end

play.

12. Latching bracket bushing (5).

• Press in far enough to eliminate all end play.

Some  9  1/2-inch  bushings  have  a  tapered  hole.
Do  not  use  a  straight  bushing,  use  only  a
tapered  bushing.

10 1/2-IN C H RING GEAR

DISASSEMBLY OF THE DIFFERENTIAL

Remove or Disconnect (Figures 9, 10, and 11)

Tools Required:

J 22912-01 Bearing Remover

1. The ring gear and differential side bearings. Refer

to “ Disassembly of the Rear Axle” in “ 10 1/2-Inch

Ring Gear.”

2. Case screws (32).

• Set the unit on the right side case half.

3. Case halves (figure 10).

A. Pry the halves apart at the yoke hole location.

B. Hold the side gear in the left side case half.

4.  Governor  assembly  (48).
5.  Latching  bracket  assembly  (43).
6.  Left  side  gear  (46).
7.  Left  side  clutch  plates  (44)  and  guide  clips  (47).
8.  Left  side  gear  thrust  washer  (45).

GMC S Series 1994, Repair Manual

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