Rear Both Sides Axle Shaft by Yukon Gear and Axle. Size: 31in. Yukon axles provide up to 50 percent increased strength over stock axles for use in extreme performance applications with large tires and high horsepower. Yukon's 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.