1997 Ford E Series Van Differential Spool E-250 Econoline - RWD - Ford 8.8 in. - Steel - For Use w/31 Spline Axles - Requires C-Clip Eliminator - Rear guaranteed to replace your current 1997 Ford E Series Van Differential Spool E-250 Econoline - RWD - Ford 8.8 in. - Steel - For Use w/31 Spline Axles - Requires C-Clip Eliminator - Rear. 1997 Ford E Series Van Differential Spool comes new OEM 1997 Ford E Series Van Differential Spool aftermarket new 1997 Ford E Series Van Differential Spool of remanufactured 1997 Ford E Series Van Differential Spool E-250 Econoline - RWD - Ford 8.8 in. - Steel - For Use w/31 Spline Axles - Requires C-Clip Eliminator - Rear.