Yukon Steel Spool for Model 20 with 29 spline axles, 3.08 & up

Yukon Steel Spool for Model 20 with 29 spline axles, 3.08 & up Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Yukon Full Spools are a cost-effective way to convert a diff to 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each Yukon 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. •Fits AMC Model 20 •3.08 and up ratio only •Provides 100% traction to both wheels at all times •Not recommended for street driven vehicles