GMC 1989 Light Duty Truck Repair Manual page 198

4B5-10 DAN A REAR AXLES
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 28).
Drive the outer bearing cup into the axle assembly
using J 7818 and J 8092 (figure 29).
Inner bearing cone (and slinger if used) on pinion.
4.
Drive the bearing onto the pinion shaft using J 5590
(figure 30).
Pinion into the axle housing.
Outer pinion bearing (7) (and slinger if used).
Do not assemble the preload shims or pinion oil seal
at this time.
Pinion flange (10).
Washer (11) and pinion nut (12).
The nut (12) while holding the pinion with
J 8614-01. Tighten the nut until it requires a
torque of 1.13 N-m (10 in. lbs.) to rotate the
pinion (figure 31). Rotate the pinion several
times to seat the bearings and assure a more
accurate reading pinion depth setting.
F igure 2 9 — Installing the Pinion Front Cup
Figure 30— Installing the Inner Bearing
9. P inion dep th c h e c k in g to o ls 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 32).
• 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
specifications, change the shim pack by the
amount the indicator needle is from the pinion
marking.
Figure 3 1 — C hecking th e Pinion P reload
F-04719