GMC 1982 Light Duty Truck Service Manual page 445

CHEVROLET 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
This fastener is an important attaching part in
NOTICE:
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
n u m b e r or with an equivalent p a rt if replacem ent
On-Vehicle S e r v i c e ............................................................ ..4B2-1
Axle S h a f t ......................................................................... ..4B2-1
H u b and D r u m ...................................................................4B2-2
D rum N on-D em ountable T y p e ......................................4B2-3
Axle Shaft B e a r i n g ........................................................4B2-2
Wheel Bolts ..................................................................... 4B2-3
Bearing A d j u s t m e n t ............................................................4B2-4
Pinion Oil Seal/Com panion Flange ...........................4B2-4
Unit R e p a i r ......................................................................... ..4B2-4
Differential C a s e .................................................................4B2-4
Rem oval ..............................................................................4B2-
Service operations on these axle assemblies may be
performed with the housing installed in the vehicle or with
the housing installed in a holding fixture. There may be
occasions, however, when it will be necessary to remove the
complete housing assembly. The following axle assembly
removal and installation procedure, therefore, is necessary
only when housing replacement is required.
NOTICE: All axle attachm ents are important attaching
parts. See N O T I C E on page 1 of this section.
Rem oval
1. Raise vehicle, place stand jacks under frame side rails,
and remove rear wheels.
2. Remove two trunnion bearing " U " bolts from the rear
yoke, split rear universal joint, position propeller shaft
to one side, and tie it to the frame side rail.
The bearings can be left on the trunnion and held in
place with tape.
3. Remove hub and d ru m assembly and disconnect
parking brake cable at lever and at flange plate. See
Section 5 for cable removal.
4. Disconnect hydraulic brake hose at connector on rear
axle housing. Refer to Section 5.
5. Disconnect shock absorbers at axle brackets.
6. Support axle assembly with hydraulic jack, remove
spring " U " bolts, and lower axle assembly to the floor.
SECTION 4B2
The following notice applies to one or more steps in the assembly
CONTENTS
ON-VEHICLE SERVICE
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.
Side Bearing R e p la c e m e n t........................................... 4B2-5
Ring G ear R e p lacem ent............................................... 4B2-5
Disassembly and Reassembly...................................... 4B2-5
Installation and A d ju stm en t........................................ 4B2-6
Drive Pin io n ........................................................................ 4B2-6
R em o v al............................................................................ 4B2-6
Disassembly...................................................................... 4B2-6
Inspection.......................................................................... 4B2-7
R eassem bly...................................................................... 4B2-7
Installation and A djustm ent........................................ 4B2-9
Operational Checks and A d ju stm e n ts........................ 4B2-9
In s ta lla tio n
1. Place axle assembly under vehicle, raise into position,
install spring " U " bolts, anchor plates and nuts, and
tighten securely.
2. Connect and secure shock absorbers to axle brackets.
3. Connect brake hose at connector on rear axle housing.
4. Connect parking brake cable at lever and flange plate.
Install hub and drum assembly. Bleed brake hydraulic
system and adjust parking brake.
Before reinstalling wheel hub and d ru m assembly
replace hub oil seal.
5. Reassemble the rear universal joint, making sure that
" U " bolts are drawn up tight and locked properly.
Caution should be taken not to overtighten " U " bolt
nuts and cause bearing cups to become distorted.
6. Install rear wheels, remove stand jacks, and lower
vehicle.
7. Test operation of brakes and rear axle.
AXLE SHAFT
R eplacem ent
1. Remove bolts that attach the axle shaft flange to the
wheel hub. See figure 4B 2 -1.
2. Rap on flange with a soft-faced ham m er to loosen shaft.
Grip the rib on end of flange with a pair of locking
pliers and twist
R EAR A X L E 4 B 2 -1
to sta rt shaft removal.