GMC 1982 Light Duty Truck Service Manual page 461

DANA 9-3/4" 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".
affect the performance of vital components and systems, an d/or could result
in major repair expense. It must be replaced with one of the same part
number or with an equivalent part if replacement 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.
On-Vehicle S e r v i c e ............................................................ 4B4-1
Unit R e p a i r ......................................................................... 4B4-1
Differential Case-Removal and D i s a s s e m b l y .........4B4-1
Drive Pinion-Removal and D is a s s e m b ly .................. 4B4-2
AXLE ASSEMBLY
The axle assembly removal and installation is identical
to the procedure given earlier for "Chevrolet 10-1/2" Ring
G ear Axle".
This Dana Spicer axle is similar in design to other
Salisbury type axles with the following exceptions:
• The differential side bearing shims are located between
the side bearing cone and roller assembly and the
differential case. See figure 4B4-1. These bearings are
of the tapered roller design and are preloaded. In order
to remove the differential case the carrier must be
spread.
• The pinion assembly incorporates an inner and outer
bearing shim. The inner shim is used to m aintain
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. Rap on axle shaft to loosen shaft from hub and
remove shafts.
4. Remove plug in carrier and drain lubricant.
SECTION 4B4
The following notice applies to one or more steps in the assembly
N O T IC E : This fastener is an important attaching part in that it could
CONTENTS
ON-VEHICLE SERVICE
UNIT REPAIR
Differential C a s e -R e a sse m b ly ...................................... 4B4-6
Drive Pinion-Installation and A d ju s tm e n t................ 4B4-4
Differential Case-Installation and A djustments . . . 4B4-6
Operational Checks and A d j u s t m e n t s ........................ 4B4-6
Drive pinion oil seal replacement requires different
special tools for the Dana axle. Use J-22281 for pinion oil
seal replacement.
5. Remove cap screws and lock washers attaching cover to
carrier. Remove cover and gasket.
6. M ark one side of carrier and m atching cap for
reassembly. Remove cap screws attaching bearing caps
to carrier.
7. Using spreader Tool J-24385 and dial indicator as
shown in figure 4B4-2, spread carrier a maximum of
.020V
Do not exceed this dimension as carrier may
NOTICE:
be permanently damaged.
8. Remove dial indicator and with the use of a pry bar
remove differential
spreader.
Disassembly
1. Remove differential bearing cups and identify with a
tag for reassembly.
2. Place differential in vise and drive out pinion shaft lock
pin.
3. Remove differential bearing cone and roller using
Puller J-22888, with Plug J - 8 107-3, as in figure 4B4-3.
Tag cone and rollers for assembly.
If ring gear and pinion are to be reassembled, note
position of shims and replace accordingly.
4. Remove spacer, pinion shaft, pinions, side gears and
thrust washers from differential case.
5. Remove screws a tta c h in g ring gear to differential
case. Remove gear.
REAR A X LE 4 B 4 -1
case from carrier. Remove