Removal - GMC 1982 Light Duty Truck Service Manual

4 B 2 -4 R EAR A X LE
Fig. 4B2-6--Tightening Adjusting Nut-Typical
5. Install adjusting nut and complete the installation as
directed under " Bearing A d ju stm en t."
B EAR ING A D JU STM E N T
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 drum in relation
to brake flange plate 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. Keyways and threads on tube and nut must be clean
and free from chips, burrs and shavings.
3. Disengage tang of retainer and remove retainer from
axle housing tube.
4. Torque adjusting nut to 70 N-m (50 ft. lbs.), at the
same time rotating the hub assembly and making sure
bearing cones are seated and in contact with the spindle
shoulder (figure 4B2-6).
Proper wheel bearing adjustm ent can be made using
tool J-2222-02 with some modification or tool J-2222-L
figure 4B2-7.
5. Back off nut until loose.
DIFFERENTIAL CASE

Removal

1. M ount axle assembly in a bench vise or holding fixture.
2. Remove cover bolts and cover, as seen in figure 4B2-8,
and allow lubricant to drain into pan.
3. Remove axle shafts.
Before proceeding with following steps, it is advisable
to check the existing ring gear to pinion backlash as
Fig. 4B2-7~Wheel Bearing Adjusting Tool
6. If adjusting nut slot in alignment with key way in axle
spindle, insert square key into slot. If adjusting nut
slot is not aligned, back off nut a slight a m ount and
insert square key into slot. Do not back off nut more
than one slot to align key.
7. Assemble snap ring at end of spindle to retain key in
position.
P IN IO N OIL S E A L /C O M P A N IO N FLANGE
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 14-11 to remove the pinion nut and the
companion flange.
4. Pry the oil seal from the bore, using care not to damage
the machined surfaces. Thoroughly clean all foreign
material from contact area.
5. Lubricate the cavity between the seal lips with a high
melting point bearing lubricant.
6. Install a new pinion oil seal into the bore, using
J-24434.
7. Reinstall the companion flange, pinion nut and
propeller shaft.
NOTICE:
regarding the above fasteners.
UNIT REPAIR
described in Step 9 o f 'Differential Case - Installation.1 This
will indicate gear or bearing wear or an error in backlash or
pinion depth setting which will help in determining cause of
axle noise. Backlash should be recorded so that if same gears
are reused, then may be reinstalled at original lash to avoid
changing gear tooth contact.
4. Remove adjusting nut lock retainers from bearing caps.
5. M a rk bearing caps for reinstallation in the same
position, and remove caps.
See N O T I C E on page 1 of this section,