GMC 1990 Light Truck Repair Manual page 181

C O D E NUMBER O N ORIGINAL PINION
+ 2 + 1
Add .001 Add .002 Add .003 Add .004
+ 2
—
Subt.
+ 1 -
Code .001
Number
Subt. Subt.
0
O n
.002 .001
Service
Subt. Subt.
Pinion -1
.003 .002
Subt.
Subt.
-2
.004 .003
Figure 14—Pinion Depth Codes
Figure 15—Installing the Pinion Cage
-2
0 -1
Add Add Add
.001 .002 .003
Add Add
-
.001 .002
Subt. Add
-
.001
.001
Subt. Subt.
-
.002 .001.
F-04748
10 1 2
/ -INCH RING GEAR 4B4-7
Figure 16—Installing the Ring Gear to Case
2. Differential side gears (29) and thrust washers (30)
to the differential case halves in their original
locations.
3. Differential spider (33) to the differential.
4. The case halves.
• Align the scribe marks on the case halves.
• Check that the mating surfaces of the differential
case and the ring gear are clean and burr free.
5. Ring gear (14) to the differential (figure 16).
• Thread two left-hand threaded studs into the
ring gear on opposite sides.
• Place the ring gear onto the case, and align
the holes in the case with the studs.
• Press the ring gear onto the case far enough
to start the bolts using J 8107 to protect the
differential from the press ram.
6. New ring gear bolts (36).
• Tighten the ring gear bolts alternately in
stages gradually pulling the ring gear onto the
differential case.