1984 Ford E Series Van Differential Spool E-350 Econoline - RWD - Dana 60 - For Use w/30 Spline Axles - Steel - 4.10 Ratio And Down - Rear guaranteed to replace your current 1984 Ford E Series Van Differential Spool E-350 Econoline - RWD - Dana 60 - For Use w/30 Spline Axles - Steel - 4.10 Ratio And Down - Rear. 1984 Ford E Series Van Differential Spool comes new OEM 1984 Ford E Series Van Differential Spool aftermarket new 1984 Ford E Series Van Differential Spool of remanufactured 1984 Ford E Series Van Differential Spool E-350 Econoline - RWD - Dana 60 - For Use w/30 Spline Axles - Steel - 4.10 Ratio And Down - Rear.