1979 Ford E Series Van Differential Carrier E-150 Econoline - RWD - Yukon Dura Grip - Ford 9 in. Rear - 31 Spline - Limited Slip - 2 Spring Smooth Setup - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear guaranteed to replace your current 1979 Ford E Series Van Differential Carrier E-150 Econoline - RWD - Yukon Dura Grip - Ford 9 in. Rear - 31 Spline - Limited Slip - 2 Spring Smooth Setup - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear. 1979 Ford E Series Van Differential Carrier comes new OEM 1979 Ford E Series Van Differential Carrier aftermarket new 1979 Ford E Series Van Differential Carrier of remanufactured 1979 Ford E Series Van Differential Carrier E-150 Econoline - RWD - Yukon Dura Grip - Ford 9 in. Rear - 31 Spline - Limited Slip - 2 Spring Smooth Setup - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear.