GMC S Series 1994, Руководство по ремонту

Страница: 163 / 919

SECTION 4B4
10 1/2-INCH RING GEAR
NOTICE: When fasteners are removed, always reinstall them at the same location from which they were
removed. If a fastener needs to be replaced, use the correct part number fastener for that application. If
the correct part number fastener is not available, a fastener of equal size and strength (or stronger) may
be used. Fasteners that are not reused, and those requiring thread locking com pound will be called out.
The correct torque value m ust be used when installing fasteners that require it. If the above conditions
are not followed, parts or system damage could result.
CONTENTS
SUBJECT PAGE
General D escription..................................................................................................................................................... 4B4- 1
Checking the Axle Before Disassem bly.............................................................................................................4B4- 2
Disassembly of the Rear A x le .............................................................................................................................. 4B4- 2
C le a n in g ....................................................................................................................................................................... 4B4- 2
In sp ectio n ....................................................................................................................................................................4B4- 2
Axle H o u sin g .......................................................................................................................................................... 4B4- 5
D ifferential............................................................................................................................................................... 4B4- 5
Pinion and Ring G ear.......................................................................................................................................... 4B4- 5
B e a rin g s ...................................................................................................................................................................4B4- 5
S h im s ........................................................................................................................................................................ 4B4- 5
Assem bly of the Rear A x le .................................................................................................................................... 4B4- 6
Pinion A ssem b ly................................................................................................................................................... 4B4- 6
Pinion In stallation................................................................................................................................................. 4B4- 7
Differential Case A s s em b ly............................................................................................................................... 4B4- 7
Side Bearing Preload A djustm ent................................................................................................................... 4B4- 8
Backlash Adjustm ent............................................................................................................................................4B4- 8
Gear Tooth Pattern C heck...................................................................................................................................... 4B4- 9
Adjustm ents Affecting Tooth C o n ta c t................................................................................................................ 4B4- 9
Final A s s e m b ly .......................................................................................................................................................... 4B4- 9
S p ecificatio n s................................................................................................................................................................ 4B4-11
Fastener Tightening Specifications......................................................................................................................4B4-11
Spacer and Shim S p ecificatio n s.......................................................................................................................... 4B4-11
Lubrication....................................................................................................................................................................4B4-11
Special Tools...................................................................................................................................................................4B4-12
GENERAL DESCRIPTION
The corporate 10 1/2-inch ring gear rear axle uses a
conventional ring and pinion gear set to transmit the
driving force of the engine to the rear wheels. This gear
set transfers this driving force at a 90-degree angle
from the propeller shaft to the axle shafts.
This axle is full-floating. The axle shaft is supported at
the wheel ends by the wheel hubs. The bolts that attach
the shaft to the hub also support the axle at the hub.
The splined end of the shaft is supported by the differ­
ential.
The pinion gear is supported in a pinion cage by
three bearings; a pinion front bearing, a pinion rear
bearing, and a pilot bearing. The pinion cage is sepa­
rate from the axle housing. Selective shims are used
between the pinion cage and the axle housing to set
the pinion depth. The pinion bearing preload is set by
crushing a collapsible spacer between the front and
rear bearings in the pinion cage.
The ring gear is bolted to the differential case with
left-hand thread bolts.
The differential case is supported by two tapered roll­
er bearings. The differential and ring gear are located in
relationship to the pinion by using two different bearing
adjusting nuts. These allow the differential to be moved
from side to side by adjusting the nuts in or out. The
differential side bearing preload is accomplished by
tightening the bearing adjusting nuts after the ring gear
backlash has been set. Two bearing caps are used to
hold the differential into the axle housing and supply
half of the threads for the bearing adjusting nuts.