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Forward Control Rear Axles

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1993 gmc forward control Rear Axles

3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear
3500 Series, disc rear brakes, motor home chassis, 11-1/2" ring gear
3500 Series, disc rear brakes, w/o motor home chassis, 10-1/2" ring gear
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 125" WB
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 133" WB
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 157" WB
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 178" WB
3500 Series, drum rear brakes, DRW
3500 Series, drum rear brakes, SRW

1992 gmc forward control Rear Axles

3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear
3500 Series, disc rear brakes, motor home chassis, 11-1/2" ring gear
3500 Series, disc rear brakes, w/o motor home chassis, 125" WB
3500 Series, disc rear brakes, w/o motor home chassis, 133" WB
3500 Series, disc rear brakes, w/o motor home chassis, 157" WB
3500 Series, disc rear brakes, w/o motor home chassis, 178" WB
3500 Series, drum rear brakes, DRW
3500 Series, drum rear brakes, SRW

1991 gmc forward control Rear Axles

3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear
3500 Series, disc rear brakes, motor home chassis, 11-1/2" ring gear
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 125" WB
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 133" WB
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 157" WB
3500 Series, disc rear brakes, w/o motor home chassis, 11-1/2" ring gear, 178" WB
3500 Series, disc rear brakes, w/o motor home chassis, 12" ring gear (Rockwell manufactured)
3500 Series, drum rear brakes, DRW
3500 Series, drum rear brakes, SRW

1990 gmc forward control Rear Axles

3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear, 157" WB
3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear, 178" WB
3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear, 208" WB
3500 Series, disc rear brakes, motor home chassis, 11-1/2" ring gear
3500 Series, disc rear brakes, w/o motor home chassis
3500 Series, drum rear brakes, DRW
3500 Series, drum rear brakes, SRW

1989 gmc forward control Rear Axles

3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear, 157" WB
3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear, 178" WB
3500 Series, disc rear brakes, motor home chassis, 10-1/2" ring gear, 208" WB
3500 Series, disc rear brakes, motor home chassis, 11-1/2" ring gear
3500 Series, disc rear brakes, w/o motor home chassis
3500 Series, drum rear brakes, DRW
3500 Series, drum rear brakes, SRW

1988 gmc forward control Rear Axles

3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1987 gmc forward control Rear Axles

3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1986 gmc forward control Rear Axles

3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1985 gmc forward control Rear Axles

3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1984 gmc forward control Rear Axles

3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1983 gmc forward control Rear Axles

3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1982 gmc forward control Rear Axles

2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1981 gmc forward control Rear Axles

2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1980 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier, early
3500 Series, DRW, removable carrier, late
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1979 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier, early
3500 Series, DRW, removable carrier, late
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1978 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1977 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1976 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1975 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1974 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1973 gmc forward control Rear Axles

1500 Series, 2.56 ratio (opt GM8)
1500 Series, 2.73 ratio (opt GU2)
1500 Series, 3.08 ratio (opt GU4)
1500 Series, 3.42 ratio (opt GU6)
1500 Series, 3.73 ratio (opt GT4)
2500 Series, 3.21 ratio (opt HC8)
2500 Series, 3.42 ratio (opt GU6)
2500 Series, 3.73 ratio (opt GT4)
2500 Series, 4.10 ratio (opt GT5)
2500 Series, 4.56 ratio (opt HC4)
3500 Series, DRW, non-removable carrier, 10 bolt cover
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.21 ratio (opt HC8)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.42 ratio (opt GU6)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 3.73 ratio (opt GT4)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.10 ratio (opt GT5)
3500 Series, DRW, non-removable carrier, 14 bolt cover, 4.56 ratio (opt HC4)
3500 Series, DRW, removable carrier
3500 Series, SRW, 3.21 ratio (opt HC8)
3500 Series, SRW, 3.23 ratio (opt GU5)
3500 Series, SRW, 3.42 ratio (opt GU6)
3500 Series, SRW, 3.73 ratio (opt GT4)
3500 Series, SRW, 4.10 ratio (opt GT5)
3500 Series, SRW, 4.56 ratio (opt HC4)

1972 gmc forward control Rear Axles

3500 Series, Eaton H-072 axle, DRW
3500 Series, Eaton H-072 axle, SRW
3500 Series, Eaton H-110 axle

1971 gmc forward control Rear Axles

3500 Series, Eaton H-072 axle, DRW
3500 Series, Eaton H-072 axle, SRW
3500 Series, Eaton H-110 axle

1970 gmc forward control Rear Axles

3500 Series, Eaton H-072 axle, DRW
3500 Series, Eaton H-072 axle, SRW
3500 Series, Eaton H-110 axle

1969 gmc forward control Rear Axles

3500 Series, Eaton H-072 axle, DRW
3500 Series, Eaton H-072 axle, SRW
3500 Series, Eaton H-110 axle

1968 gmc forward control Rear Axles

3500 Series, Eaton H-072 axle, DRW
3500 Series, Eaton H-072 axle, SRW
3500 Series, Eaton H-110 axle

1967 gmc forward control Rear Axles

3500 Series, Eaton H-072 axle, DRW
3500 Series, Eaton H-072 axle, SRW
3500 Series, Eaton H-110 axle

1966 gmc forward control Rear Axles

1965 gmc forward control Rear Axles