Chevrolet 1991 Light Duty Truck Repair Manual page 241

2. Drive the inner bearing cup into the axle assembly
using D 111 and C 4171. The cup must be seated
on the shims (figure 29).
3. Drive the outer bearing cup into the axle assembly
using J 7818 and J 8092 (figure 30).
4. Inner bearing cone (and slinger if used) on the
pinion. Drive the bearing onto the pinion shaft
using J 5590 (figure 31).
5. Pinion into the axle housing.
6. Outer pinion bearing (7) and thrust washer (8).
• 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 enut until it requires a torque of 1.13
N.m (10 in. lbs.) to rotate the pinion (figure 32).
Rotate the pinion several times to seat the
bearings and assure a more accurate reading
pinion depth setting.
Figure 31—Installing the Inner Bearing
Figure 32—Checking the Pinion Preload
9 3/4-INCH RING GEAR FRONT AXLE 4C2-11
9. The 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
• Place the pinion height block on top of the pin­
• Set the dial indicator at zero and slide the
• The indicator will turn to the right or to the left
• The needle will move to the left if the pinion is
• The needle will move to the right if the pinion is
• If the indicator reading is within 0.05mm
• Remove the pinion nut (12), washer (11), pinion
flange (10), slinger (8) and bearing cone (7).
10. Preload shims (6).
• Install the shims that were removed, or mea­
11. Outer bearing (7) and slinger (8).
• Apply a light coat of axle lubricant to the pinion
seal lip.
12. Outer pinion oil seal (9) using D 163 (figure 34).
13. Pinion flange (10).
14. Washer (11) and a new pinion nut (12).
| ^ |
• The nut (12) while holding the pinion with
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• Remove shims to decrease the preload.
• Add shims to increase the preload.
F4720
Figure 33—Checking the Pinion Depth Setting
bearing bore.
ion.
scooter gage across the arbor (figure 33).
at the point of greatest deflection, depending
on the pinion marking.
marked (+).
marked (-).
(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
amount the indicator needle is from the pinion
marking.
sure the old shims and replace them with new
shims if necessary.
Tighten (Figure 35 and 36)
J 8614-01 enut until it requires a torque of 2.26
- 4.53 N.m (20 - 40 in. lbs.) to rotate the pinion.
F4721