Eaton Posi Performance Differential - GM 8.5" 10 Bolt, 1971-89 GM Passenger Car - 28 Spline, 1.20" Axle Diameter - 2.73 Ratio and Up Large Arms made with a Modified X3-696RS-G1-HK PWI20103 Size:5X-Large (76) 5 1 8 and

Arms made with a Modified Alloy material give the device a dampening characteristic in a crash

1990-1993 Dodge D350Adds an additional 4-quarts of capacity over stock A727 pan

1988-1991 Oldsmobile Cutlass Calais

1978-1987 Pontiac Grand Prix

Gauge cup depth only

Eaton Posi Performance Differential GM 8.5" 10 Bolt, 1971 89 GM Passenger Car 28 Spline, 1.20" Axle Diameter 2.73 Ratio and Up Large Arms made with a Modified X3 696RS G1 HK PWI20103 Size:5X Large (76) 5 1 8 and Arms made with a Modified Alloy material give the device a dampening characteristic in a crash 1990 1993 Dodge D350Adds an additional 4 quarts of capacity over stock A727 pan