GMC 1982 Light Duty Truck Service Manual page 455

DANA 10-1/2 RING GEAR AXLE
procedure of components in this portion of the manual as indicated at
appropriate locations by the terminology "See Notice on Page 1 of this
Section ".
NOTICE: This fastener is an important attaching part in
that it could affect the performance of vital components
and systems, a n d /o r could result in m ajor repair
expense. It must be replaced with one of the same part
nu m b er or with an equivalent p a rt if replacem ent
On-Vehicle S e rv ic e ........................................................... 4B3-1
Unit R e p a ir ......................................................................... 4B3-1
Differential Case-Removal and Disassembly.......... 4B3-1
Drive Pinion-Removal and Disassembly.................. 4B3-3
Differential Case-R eassem bly........................ ............ 4B3-4
Procedures for service to axle assembly, axle shafts,
hub and drum components and bearing adjustments are
identical to those described for "Chevrolet 10-1/2" Ring
G ear A xle".
This Dana Spicer axle is similar in design to other
Salisbury type axles with the following exceptions:
• In order to remove the differential case, the carrier
must bespread.
• The drive pinion assembly incorporates an inner and
outer bearing shim. The inner shim is used to maintain
proper pinion depth. The outer shim is used to maintain
proper preload on the pinion bearing.
DIFFERENTIAL CASE
Rem oval
1. Place vehicle on hoist with rear axle hanging free.
2. Remove wheel and tire assemblies.
3. The axle shafts are full-floating type with flanged outer
end of shaft attached to wheel hub by studs and nuts.
Wheel is supported by tapered roller bearings at outer
end of axle housing.
a. Remove axle shaft to hub attaching nuts.
b. R ap on axle shaft to loosen shaft from hub and
remove shafts.
4. Remove plug in carrier and drain lubricant.
5. Remove cap screws and lock washers attaching cover to
carrier. Remove cover and gasket.
6. M a rk one side of c a rrie r and m atch in g cap for
reassembly in the same position. Remove bearing caps.
SECTION 4B3
The following notice applies to one or more steps in the assembly
CONTENTS
ON-VEHICLE SERVICE
UNIT REPAIR
becomes necessary. Do not use a replacement part of
lesser quality or substitute design. Torque values must
be used as specified during reassembly to assure proper
retention of this part.
Shim Requirements-Gaging Procedures.................. 4B3-4
Drive Pinion-Assembly and Installation.................. 4B3-5
Differential Case-Installation and A d ju stm en ts..... 4B3-6
Operational Checks and A d ju stm e n ts...................... 4B3-6
Drive pinion oil seal replacement requires different
special tools for the Dana axles. Follow the same procedure
listed for "C h evrolet 10-1/2" Ring G e a r A x le "; use
J-24384 for seal replacement on Dana 10-1/2" Ring Gear
Axles.
7. Using spreader tool J-24385, and a dial indicator as
shown in figure 4B3-2, spread carrier a maximum of
.015 inch.
NOTICE: Do not exceed this dimension, as carrier may
be permanently damaged.
8. Remove the dial indicator and use a prybar to remove
the differential case from the carrier. Record the
dimensions and location of the side bearing shims.
Remove the spreader tool.
Disassembly
1. Remove differential side bearings by placing J-22912
under bearings and supporting plates on a press bed.
Apply force to pilot plug J - 8 107-3 to drive the case
from the bearing.
Use care not to dam age case hubs with tool J - 2 2 9 12.
2. Remove the ring gear bolts and the ring gear. T ap the
ring gear with a soft-faced hammer to free it from the
case.
3. Scribe both case halves for reassembly in same position.
4. Remove bolts holding case halves together, as shown in
figure 4B3-3.
5. Tap lightly on top half of case to free it from the bottom
half. Remove top half of case.
6. Lift out all internal parts.
REAR A X LE 4 B 3 -1