1979 Ford E Series Van Differential Carrier E-150 Econoline - RWD - Yukon Dura Grip positraction - Dana 44 - 30 Spline axles - 3.92 And Up ratios - Rear guaranteed to replace your current 1979 Ford E Series Van Differential Carrier E-150 Econoline - RWD - Yukon Dura Grip positraction - Dana 44 - 30 Spline axles - 3.92 And Up ratios - 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 positraction - Dana 44 - 30 Spline axles - 3.92 And Up ratios - Rear.