Yukon (YA W46101) 4340 Chrome-Moly Replacement Outer Stub for Ford Dana 60 Differential Yukon 4340 Chrome-Moly replacement outer stub for Dana 60, '77 and newer Ford with a length of 11-3/8" and 35 splines Yukon 4340 Chrome-Moly axles provide up to 50% increased strength over stock axles for use in extreme performance applications with large tires and high horsepower Yukon's 4340 axles are manufactured using the latest technologies and the highest quality materials to ensure high strength and long life Limited Lifetime warranty covers manufacturing defects and axle breakage for as long as you own the vehicle This warranty is not transferable to another party Limited Lifetime Warranty Performance Axles Axles Made from High Grade 4340 Chromoly Steel for Superior Strength