1964 Ford F Series Trucks Differential Spool F-250 - Dana 44 - w/ 30 Spline Axles - Spartan Locker - Installs into standard open carrier case - Front guaranteed to replace your current 1964 Ford F Series Trucks Differential Spool F-250 - Dana 44 - w/ 30 Spline Axles - Spartan Locker - Installs into standard open carrier case - Front. 1964 Ford F Series Trucks Differential Spool comes new OEM 1964 Ford F Series Trucks Differential Spool aftermarket new 1964 Ford F Series Trucks Differential Spool of remanufactured 1964 Ford F Series Trucks Differential Spool F-250 - Dana 44 - w/ 30 Spline Axles - Spartan Locker - Installs into standard open carrier case - Front.