Yukon Gear - ZP FSD44-4-30UP
USA standard steel spool for Dana 44 with 30 spline axles, 3.92 & up
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.