GMC T Series 1994 Repair Manual page 259

ALL WHEEL DRIVE FRONT AXLE
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 compound 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.
SUBJECT
General Description......................................................................................................................................................4C3- 2
Disassembly of the A x le .............................................................................................................................................4C3- 2
Inspection.................................................................................................................................................................... 4C3- 2
D isassem bly............................................................................................................................................................... 4C3- 2
C leaning....................................................................................................................................................................... 4C3- 4
Inspection....................................................................................................................................................................4C3- 4
Axle H ousing.......................................................................................................................................................... 4C3- 4
D ifferential............................................................................................................................................................... 4C3- 5
Ring and Pinion G ears........................................................................................................................................ 4C3- 5
B earin g s...................................................................................................................................................................4C3- 5
Thrust Washers, Shims, and Adjuster S leeves........................................................................................... 4C3- 6
Assembly of the A x le .................................................................................................................................................. 4C3- 7
Differential Case Assem bly.................................................................................................................................... 4C3- 7
Pinion Bearing Installation..................................................................................................................................... 4C3- 8
Pinion Depth A djustm ent....................................................................................................................................... 4C3- 8
Pinion Installation......................................................................................................................................................4C3- 8
Differential Case Installation..................................................................................................................................4C3-10
Adjusting B acklash .................................................................................................................................................. 4C3-10
Gear Tooth Contact Pattern C h eck......................................................................................................................4C3-12
Gear Tooth Nom enclature................................................................................................................................... 4C3-12
Test.............................................................................................................................................................................4C3-12
Adjustments Affecting Gear Tooth C o n tact......................................................... ........................................ 4C3-12
Final A ssem b ly.......................................................................................................................................................... 4C3-12
Drive Axle A ssem b ly.......................................................................................................... ........................................ 4C3-14
Outer Deflector R in g ................................................................................................................................................ 4C3-14
ABS Sensor Ring.......................................................................................................................................................4C3-14
Outer Joint S eal.........................................................................................................................................................4C3-16
Outer Joint A ssem bly..............................................................................................................................................4C3-17
Inner Tripot S e a l........................................................................................................................................................4C3-19
S p ecifications.................................................................................................................................................................4C3-21
Fastener Tightening Specifications......................................................................................................................4C3-21
Available Shim Sizes................................................................................................................................................ 4C3-21
Pinion Preload and B acklash ................................................................................................................................4C3-21
Lubrication...................................................................................................................................................................4C3-21
Special T o o ls ..................................................................................................................................................................4C3-22
SECTION 4C3
7 1/4-INCH RING GEAR
CONTENTS
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