On-Vehicle Service; Axle Assembly; Axle V E N T; Wheel Bolt Replacement - GMC 1982 Light Duty Truck Service Manual

Fig. 4B5-2a -- Pinion Oil Seal

AXLE ASSEMBLY

The axle assembly removal and installation is identical
to the procedure given earlier for " Chevrolet 10-1/2" Ring
G ear A xle" (Section 4B2).

AXLE V E N T

R eplacem ent
If axle vent requires replacement, pry old vent from
housing being sure that entire vent is removed. Prick punch
around carrier hole to insure fit of replacement vent. Tap
new vent into housing using a soft-faced hammer. Vent
should be positioned in housing so that flat surface is toward
centerline of differential carrier.
AXLE SHAFT
R eplacem ent
1. Remove hub cap, and install Tool J - 8 117 in tapped hole
on shaft flange.
2. Install slide hammer, Tool J-2619, and remove axle
shaft.
3. Thoroughly remove old gasket material from hub and
hub cap. Clean shaft flange and mating surfaces in the
wheel hub.
4. Install axle shaft so that the flange splines index into
hub splines. Tap shaft into position, using J - 8 117 and
J-2619.
5. Install new gasket, position flange to hub and install
attaching bolts. Torque bolts to specifications.

ON-VEHICLE SERVICE

WHEEL BOLT REPLACEMENT

Refer to procedure listed under "Chevrolet 10-1/2"
Ring G ear Axle (Section 4B2).
BEARING A D JU STM ENT
Before checking bearing adjustment, make sure brakes
are fully released and do not drag.
Check bearing play by grasping tire at top and pulling
back and forth, or by using a pry bar under tire. If bearings
are properly adjusted, movement of brake rotor will be
barely noticeable and wheel will turn freely. If movement is
excessive, adjust bearing as follows:
1. Remove axle shaft and raise vehicle until wheel is free
to rotate.
2. Disengage tang of retainer from locknut and remove
both locknut and retainer from axle housing tube with
tool J-25510.
3. Use J -2 5 5 10 to tighten inner adjusting nut at the same
time rotating hub to make sure all bearing surfaces are
in contact. Then back off inner nut to specified amount
of turn-back.
4. Install tanged retainer against the inner adjusting nut.
Align inner adjusting nut so short tang of retainer will
engage nearest slot on inner adjusting nut.
5. Install outer locknut and tighten to correct specified
torque. Then bend long tang of retainer into slot of
outer nut. This method of adjustment will result in the
proper bearing adjustment.
DRIVE P IN IO N OIL SEAL
R eplacem ent
The pinion oil seal may be replaced with the carrier
assembly installed in the vehicle.
1. Disconnect propeller shaft.
2. Scribe a line down the pinion stem, pinion nut and
companion flange.
3. Use J - 8 6 14-1 1 to remove the pinion nut and the
companion flange.
4. Remove the bolts retaining the oil seal retainer to the
carrier, and remove the retainer. See Figure 4B5-2a.
5. Pry the oil seal from the bore, using care not to damage
the machined surfaces. Thoroughly clean all foreign
material from contact area.
6. Lubricate the cavity between the seal lips with a high
melting point bearing lubricant.
7. Install a new pinion oil seal into the bore, using
J -2 2 2 8 1. Be sure seal bottoms against shoulder in bore.
8. Install the bearing retainer to the carrier.
9. Reinstall the companion flange, pinion nut and
propeller shaft.

DIFFERENTIAL CARRIER

Rem oval (Fig. 4 B 5-3)
1. Remove plug from bottom of axle housing and drain
lubricant.
2. Remove the axle shaft from the drive unit and housing.
3. Disconnect universal at pinion shaft.
REAR A X LE 4 B 5 -3