Mini Spool, 28 Spline, 8" Or 9" Ford

These lightweight steel mini spools are made to replace the spider gear assemblies in the Ford differential offering a solid locked rear. They are available to fit 31 and 28 spline axles. And weigh only 4 lbs. These lightweight steel mini spools are made to replace the spider gear assemblies in the Ford differential offering a solid locked rear. They are available to fit 31 and 28 spline axles. And weigh only 4 lbs. each.