Chevrolet 1991 Light Duty Truck Repair Manual page 185

Figure 70— Installing the Pinion Front Cup
1. Place the required amount of shims (and baffle if
used) in the inner bearing bore.
2. Drive the inner bearing cup into the axle assembly
using C-4204 and C-4171. The cup must be seat­
ed on the shims (figure 69).
3. Drive the outer bearing cup into the axle assembly
using J 7818 and J 8092 (figure 70).
4. Inner bearing cone (and slinger if used) on pinion.
Drive the bearing onto the pinion shaft using
J 5590 (figure 71).
• If installing a new bearing, be certain that it is
the same width as the old bearing.
5. Pinion into the axle housing.
6. Outer pinion bearing (7) (and slinger if used).
• Do not assemble the preload shims or pinion oil
seal at this time.
7. Pinion flange (10).
8. Washer (11) and pinion nut (12).
Tighten
• The nut (12) while holding the pinion with
J 8614-01 nut until it requires a torque of 1.13
Figure 71—Installing the Inner Bearing
DANA REAR A XLES 4B5-23
Figure 72—Checking the Pinion Preload
N-m (10 in. lbs.) to rotate the 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 pin­
ion.
• 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 0.05mm
(0.002-inch) of the pinion marking, the pinion is
correctly set. If the pinion depth does not meet
specifications, change the shim pack by the
Figure 73—Checking the Pinion Depth Setting
F4721