Dropout Assembly For Toyota T100 Rear Differential 30 Spline 3.90 Ratio T100 8.4 Inch Toyota 3.90 30 Spline Open Carrier 3RD Member Assembly W/ Yoke Yukon Gear & AxleYukon dropout assemblies are built by expert Yukon technicians and come complete, fully 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. Yukon 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