Installing a quality USA Standard Gear spool is a cost-effective way to get 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each USA Standard Gear spool is made from high-quality 8620 steel and heat treated for additional strength. A spool is an outstanding choice for dedicated off-road and drag racing vehicles only.
USA Standard Spool For Ford 9in / 31 Spline
USA standard spool for Ford 9", 31 spline
,1.785,31spl,9,FORD,JRNL,SPOOL,STEEL,ZP,
9"FORD 31spl STEEL SPOOL, 1.785"JRNL
Differential Spool
ZP FSF9-31
Spool