Dana 10-1/2" Ring Gear; Dana 9-3/4"Ring Gear - Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual

4B -2 0 REAR AXLE
Fig. 4B -35--T ightening A d ju s tin g N u t-T yp ica l
BEARING ADJUSTMENT
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. Disengage tang of retainer from locknut and remove
both locknut and retainer from axle housing tube.
3. Using J-2222, tighten inner adjusting nut to specified
torque 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.
See figure 4B-35, and refer to Specifications Section for
torque values.
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 PINION OIL SEAL
Replacement
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-8614-11 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.
LIG H T T R U C K SER V IC E MANUAL
6 . Install a new pinion oil seal into the bore, using
J-24434.
7. Reinstall the companion flange, pinion nut and
propeller shaft.
CAUTION: See CAUTION on page 1 of
this section, regarding
fasteners.
DANA 10-1/2" RING GEAR AXL^E
DANA 9-3/4" RING GEAR AXLE
Procedures for service to axle assembly, axle shafts,
hub and drum components and bearing adjustments are
identical to those listed for "Chevrolet 10-1/2 Ring Gear
Axle".
Drive pinion oil seal replacement requires different
special tools for the Dana axles. Follow the same procedure
listed for "Chevrolet 10-1/2" Ring Gear Axle"; use J-24384
for seal replacement on Dana 10-1/2" Ring Gear Axles, and
use J-22281 for pinion oil seal replacement on Dana 9-3/4"
Ring Gear Axles.
12-1/4" RING GEAR AXLE
AXLE ASSEMBLY
The axle assembly removal and installation is identical
to the procedure given earlier for "Chevrolet 10-1/2" Ring
Gear Axle".
AXLE VENT
Replacement
Service replacement axle housing assemblies are not
equipped with an axle vent; therefore, always make sure that
a new vent assembly is installed when replacing the housing.
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. See figure 4B-36.
AXLE SHAFT
Replacement
1. Remove hub cap, and install Tool J-8117 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-8117 and J-
2619.
5. Install new gasket, position flange to hub and install
attaching bolts. Torque bolts to specifications.
HUB AND DRUM ASSEMBLY
Removal
Use the procedure given for "Chevrolet 10-1/2" Ring
Gear Axle", and use J-0870 to remove the adjusting nut.
Refer to figure 65.
the above
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