Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Fig. 10 Pinion depth gauge tool installation. Corvette
Adjustment
1.
Install pinion bearing races in housing using a suitable driver.
2.
Lubricate pinion bearings and install bearings in races.
3.
Mount depth gauging jig in housing,
Fig. 8, noting the following:
a.
Assemble gauge plate onto preload stud.
b.
Hold pinion bearings in position, insert stud through rear bearing and pilot and front bearing and pilot, then install retaining nut and tighten
nut until snug.
c.
Rotate tool to ensure bearings are properly seated.
d.
Hold preload stud and tighten nut until 20 inch lbs. of
torque, which is required to rotate stud. To prevent damage to bearing, tighten nut in
small increments, checking rotating torque after each adjustment.
e.
Mount side bearing discs on arbor, using step for disc that corresponds to base of housing.
f.
Mount arbor and plunger assembly in housing, ensuring side bearing discs are properly seated, install bearing caps and tighten cap bolts to
prevent bearing discs from moving,
Fig. 9.
4.
Mount dial indicator on arbor stud with indicator contact button bearing against top of arbor plunger.
5.
Preload indicator 3/4 revolution and secure to arbor mounting stud in this position.
6.
Place arbor plunger on gauge plate, rotating plate as needed so that plunger rests directly on button corresponding to ring gear size.
7.
Slowly rock plunger rod back and forth across button while observing dial indicator.
8.
At point on button where indicator registers greatest deflection, zero dial indicator.
Perform steps 7 and 8 several times to ensure correct
setting.
9.
Once verified zero reading is obtained, swing plunger aside until it is clear of gauge plate button and record dial indicator reading.
Indicator will
now read required pinion depth shim thickness for a ``nominal'' pinion.
10.
Inspect rear face of drive pinion to be installed for a pinion code number. This number indicates in thousandths of an inch necessary modification
of pinion shim thickness obtained in step 9.
11.
Select pinion depth adjusting shim as follows:
a.
If pinion is stamped with a plus (+) number, add that number of thousandths to dimension obtained in step 9.
b.
If pinion is stamped with a minus ( - ) number, subtract that many thousandths from dimension obtained in step 9.
c.
If pinion is not stamped with plus or minus number, dimension obtained in step 9 is correct shim thickness.
12.
Remove gauging tools and pinion bearings from housing, noting installation position of bearings.
Installation
1.
Install selected shim onto pinion shaft, lubricate rear pinion bearing with specified axle lubricant, then press rear bearing onto pinion using suitable
spacers.
2.
Install new collapsible spacer onto pinion shaft, then insert pinion assembly into housing.
3.
Lubricate front pinion bearing, install bearing into housing and tap bearing over pinion shaft with a drift while assistant holds pinion in place.
Old
pinion nut and a large washer can be used to seat front bearing on pinion, but care must be taken not to collapse spacer if this method is
used.
