GMC 1990 Light Truck Repair Manual page 209

Figure 71—Installing the Inner Bearing
pinion (figure 72). Rotate the pinion several
times to seat the bearings and assure a more
accurate reading pinion depth setting.
9. Pinion depth checking tools D-116-1, D-116-2,
D-115-3, and D-115 to the top of the pinion.
• Place the discs and arbor into the differential
bearing bore.
• Place the pinion height block on top of the
pinion.
• Set the dial indicator at zero (0) and slide the
scooter gage across the arbor (figure 73).
• The indicator will turn to the right or to the left
at the point of greatest deflection, depending
on the pinion marking.
• The needle will move to the left if the pinion is
marked (+ ).
• The needle will move to the right if the pinion
is marked (-).
• If the indicator reading is within 0.05 mm
0 002
( . -inch) of the pinion marking, the pinion is
correctly set. If the pinion depth does not meet
Figure 72—Checking the Pinion Preload
DANA REAR AXLES 4B5-23
F-04719
Figure 73—Checking the Pinion Depth Setting
specifications, change the shim pack by the
amount the indicator needle is from the pinion
marking.
Remove the pinion nut (12), washer (11), pinion
flange (10), slinger (
Preload shims (
10 .
• Install the shims that were removed, or
measure the old shims and replace them with
new shims if necessary.
Outer bearing (7) and slinger (
11
.
Apply a light coat of axle lubricant to the pinion seal
lip.
Outer pinion oil seal (9) using D-163 (National)
12 .
sealer installer (figure 74).
13. Pinion flange (10).
14. Washer (11) and a new pinion nut (12).
Tighten (Figures 75 and 76)
The nut (12) while holding the pinion with
J 8614-01. Tighten the nut until it requires a
torque of 2.26-4.53 N m (20-40 in. lbs.) to
rotate the pinion.
Figure 74—Installing the Pinion Seal
F-04721
8
) and bearing cone (7).
6
).
8
).