Yukon Gear Dropout Assembly for Toyota 8in Rear Differential w/Steel Spool 30 Spline 4.88 RatioYukon dropout assemblies are built by expert Yukon technicians and come complete, properly shimmed and backlashed to spec. All you do is install the third member into your diff housing, bolt on the diff cover, add fluid, and roll. This unit features a nodular iron case which improves rigidity and power handling, reducing deflection for consistent gear contact and a long service life. This assembly is upgraded with a Yukon steel spool for maximum