Assembly Of The Differential; 101/2-Inch Ring G Ear; Disassembly Of The Differential - GMC T Series 1994 Repair Manual

Thrust Block Clearance Adjustment
+4-
Install or Connect (Figures 1, 6, and 7)
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, firmly 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-INCH 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).
9. Reaction blocks (41), pinion yoke (42), pinion gears
(39), and pinion thrust washers (38).
10. Right cam unit from the differential.
11. Right side gear thrust washer (36).
• Measure and record the overall length of the
gear assembly from the front of the gear to the
back of the thrust sleeve (35) including the side
gear thrust washer (36).
12. Thrust sleeve (35) using J 22912-01.
• Press the sleeve from the side gear (figure 11).
13. Clutch plates (37).
14. Guide clips (34).
15. Wave washer (15).
16. Cam plate (33).
17. Side cam gear (40).