Chevrolet 1988 Light Duty Truck Repair Manual page 270

4C2-12 9 /4-INCH RING GEAR FRONT AXLE
3
Figure 32— Checking the Pinion Preload
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.
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
bearing bore.
• Place the pinion height block on top of the
pinion.
• Set the dial indicator at zero and slide the
scooter gage across the arbor (figure 33).
• 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 in dicator reading is w ithin 0.05 mm
(0.002-inch) of the pinion marking, the pinion is
correctly set. If the pinion depth does not meet
Figure 33 — Checking the Pinion Depth Setting
Figure 34— Installing the Pinion Seal
specifications, change the shim pack by the
am ount the indicator needle is from the pinion
m arking.
Remove the pinion nut (12), w asher (11), pinion
flange (10), slinger (8) and bearing cone (7).
10 Preload shims (6).
.
• In s ta ll th e s h im s th a t w ere re m o ve d , or
m easure the old shim s and replace them with
new shims if necessary.
Outer bearing (7) and slinger (8).
11
.
A pply 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. W asher (11) and a new pinion nut (12).
T ig h te n (F ig u re 35 and 36)
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.
Remove shims to decrease the preload.
F-04721
Figure 35— Tightening the Pinion Nut