Chevrolet 1977 light duty truck Service Manual page 373

slot o f outer nut. This method o f adjustment will result
in the pro per hearing adjustment.
DRIVE P IN IO N OIL SEAL
Replacement
N OTE: The pinion oil seal may he replaced with
the carrier assembly installed in the vehicle.
1. Disconnect propeller shaft.
2. Scribe a line down the pinion stem, pinion nut
and co m panion flange.
3. Use J-8614-11 to remove the pinion nut and the
c o m pa n io n flange.
4. Pry the oil seal from the bore, using care not to
d a m ag e the m achined surfaces. Thoroughly clean all
foreign m aterial from contact area.
5. Lubricate the cavity between the seal lips with a
high melting point bearing lubricant.
6. Install a new pinion oii seal into the bore, using
J-24434.
7. Reinstall the com panion flange, pinion nut and
propeller shaft.
CAUTION: See C A U T IO N on page 1 o f this
section, regarding the above fasteners.
D A N A 1 0 - 1 / 2
D A N A 9 - 3 / 4
A X L E
Procedures for service to axle assembly, axle shafts,
hub and drum components and bearing adjustments are
identical to those listed for "C hevrolet 10-1/2 Ring G e a r
Axle".
Drive pinion oil seal replacem ent requires different
special tools for the D a n a axles. Follow the same
procedure listed for "C hevrolet
Axle"; use J-24384 for seal replacem ent on D ana 10-
1/2" R ing G e a r Axles, and use J-22281 for pinion oil
seal replacem ent on D a n a 9 -3 /4 " Ring G e a r Axles.
1 2 - 1 / 4 R I N G
AXLE ASSEMBLY
T he axle assembly
identical to the procedure given earlier for "Chevrolet
10-1/2" Ring G e a r Axle".
AXLE V E N T
Replacement
Service replacem ent 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 th a t entire vent is removed.
Prick punch arou nd carrier
replacem ent vent. T a p new vent into housing using a
soft-faced ham m er. Vent should be positioned in housing
so that flat surface is toward centerline o f differential
carrier. See figure 4B-36.
R I N G G E A R A X L E
R I N G G E A R
10-1/2" Ring G e a r
G E A R A X L E
removal and installation
hole to insure fit o f
V E N T A S S E M B L Y
T O B E I N S T A L L E D W I T H
F L A T S U R F A C E F A C I N G
C E N T E R L I N E O F R E A R
A X L E D I F F E R E N T I A L
H O U S IN G .
Fig. 4B-36--Typical Axle Vent Installation
AXLE SHAFT
Replacement
1. Remove hub cap, and install Tool J-8117 in
tapped hole on shaft flange.
2. Install slide ham m er, Tool J-2619, and remove
axle shaft.
3. Thoroughly remove old gasket material from
hub and hub cap. Clean shaft flange and
surfaces in the wheel hub.
4. Install axle shaft so that the flange splines index
into hub splines. T a p 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.
H UB AND D R U M ASSEMBLY
is
Removal
Use the procedure given for "Chevrolet 10-1/2"
Ring G e a r Axle", and use J-0870 to remove the adjusting
nut.
Bearing Cup—Removal
1. Cut a suitable length of 1/2 inch steel bar stock
for press-out tool.
2. Place bar stock tool behind inner bearing cup,
index tool in provided notches, and press out cup with an
a rbor press.
3. Use J-22380,
remove outer bearing retainer ring.
4. Remove the outer bearing by driving on the
axle shaft spacer, using the splined flange cut from an
old axle shaft, as shown in figure 4B-38.
mating
as shown in figure 4B-37, to