1975 Ford F Series Trucks Differential Carrier F-100 - 4WD - Dana 44 - Yukon Grizzly Locker - 30 Spline - 3.92 And Up - 7/16 in. Bolt holes - Rear guaranteed to replace your current 1975 Ford F Series Trucks Differential Carrier F-100 - 4WD - Dana 44 - Yukon Grizzly Locker - 30 Spline - 3.92 And Up - 7/16 in. Bolt holes - Rear. 1975 Ford F Series Trucks Differential Carrier comes new OEM 1975 Ford F Series Trucks Differential Carrier aftermarket new 1975 Ford F Series Trucks Differential Carrier of remanufactured 1975 Ford F Series Trucks Differential Carrier F-100 - 4WD - Dana 44 - Yukon Grizzly Locker - 30 Spline - 3.92 And Up - 7/16 in. Bolt holes - Rear.