Ford Truck Differential Identification

A differential is a device used in conjunction with automobile axles. It is used to transmit torque, or twisting force, through shafts. Two kinds of information may be drawn upon to identify differentials on Ford trucks. This includes the size of the differential and the vehicles in which they are found.

7.5-Inch

Ford's 7.5 differential comes with 10 bolts and 7.5-inch ring gear. They are used in the Ford Aerostar, Bronco II and the non-4.0 Ford Ranger. The differential and axle housing are in one unit.

8.8-Inch

Ford's 8.8 differential comes with 10 bolts and 8.8-inch ring gear. These differentials are used in the Ford Bronco (after 1983), the Ford F-150, the Ranger and the Explorer. It has an axle ratio ranging from 2.73-to-1 to 3.73-to-1.

9-Inch

Ford's 9-inch differential comes with no bolts and no inspection cover. It comes with 9-inch ring gear. These are used in the Ford F-140 (between 1966 and 1982), the Ford F-250 and the Ford Bronco. This differential has a rounded, center section ring gear cover.

10.25-Inch

Ford's 10.25 differential comes with 12 bolts and 10.25-inch ring gear. They are used on the Ford F-250 (after 1983), the Ford F-250 HD and the Ford F-350.

References

• Modified Mustangs and Fords: Ford Differential Builder's Guide