1960 Ford F Series Trucks Differential Carrier F-250 - Dana 44 - Yukon Grizzly Locker - 30 Spline - 3.73 And Down Ratio or Thick Gears - 7/16 in. Bolt holes - Front guaranteed to replace your current 1960 Ford F Series Trucks Differential Carrier F-250 - Dana 44 - Yukon Grizzly Locker - 30 Spline - 3.73 And Down Ratio or Thick Gears - 7/16 in. Bolt holes - Front. 1960 Ford F Series Trucks Differential Carrier comes new OEM 1960 Ford F Series Trucks Differential Carrier aftermarket new 1960 Ford F Series Trucks Differential Carrier of remanufactured 1960 Ford F Series Trucks Differential Carrier F-250 - Dana 44 - Yukon Grizzly Locker - 30 Spline - 3.73 And Down Ratio or Thick Gears - 7/16 in. Bolt holes - Front.