1980 Ford F Series Trucks Differential Carrier F-100 - RWD - Ford 9 in. - Yukon Grizzly Locker - 31 Spline - 1.783 in. Diameter Bearing Journals - Fits Load Bolt Housing - Rear guaranteed to replace your current 1980 Ford F Series Trucks Differential Carrier F-100 - RWD - Ford 9 in. - Yukon Grizzly Locker - 31 Spline - 1.783 in. Diameter Bearing Journals - Fits Load Bolt Housing - Rear. 1980 Ford F Series Trucks Differential Carrier comes new OEM 1980 Ford F Series Trucks Differential Carrier aftermarket new 1980 Ford F Series Trucks Differential Carrier of remanufactured 1980 Ford F Series Trucks Differential Carrier F-100 - RWD - Ford 9 in. - Yukon Grizzly Locker - 31 Spline - 1.783 in. Diameter Bearing Journals - Fits Load Bolt Housing - Rear.