GMC 1989 Light Duty Truck Repair Manual page 253

Fastener
Ring Gear Bolts.........................................................................................................................................
Bearing Cap B o lts....................................................................................................................................
Axle Cover B o lts .......................................................................................................................................
Differential Side Bearing Spacer..............................................................................................................
Differential Side Bearing K its.....................................................................................................................
Pinion Bearing Shim K its ............................................................................................................................
Pinion Preload (New Bearings).................................................................................................................2.2-2.8 N-m (20-25 in. lbs.)
(Used B e aring s).............
Backlash (New G e a rs )......................................................................................................................... 0.13-0.23 mm (0.005-0.009-in.)
Backlash (Used G e ars)......................................................................................................................... 0.08-0.28 mm (0.003-0.011-in.)
SPECIFICATIONS
8 1/2 INCH RING GEAR FRONT AXLE
TORQUE SPECIFICATIONS
AVAILABLE SHIM AND SPACER SIZES
PINION PRELOAD AND BACKLASH
............................................................................................... 1.1-1.6 N-m (10-15 in. lbs.)
1/2-INCH RING GEAR 4C1-13
8
N-m
.......
Ft. Lbs.
80 60
80 60
27
20
0 170-inch-0.172- nch
0 064 - 0.070- nch
0.040 - 0.044- nch
0.046 - 0.050- nch
0.052 - 0.056- nch
0.058 - 0.063- nch
0.072 - 0.078- nch
0.080 - 0.086- nch
0.088 - 0.094- nch
0.096 - 0.100- nch
0 020 - 0.024- nch
0.025 - 0.029- nch
0.030 - 0.034- nch
0.035 - 0.039- nch