Front Axle; Dana 30 JK Outer Stub 30 SplineUses 5-760x --- Original equipment front axle shafts are designed for original equipment tire sizes and moderate off road use. When you upgrade your Jeep or 4x4, you need to upgrade your axle shafts. TEN Factory designs our front axle shafts to maximize strength and durability, and back them with an exclusive TEN-Year Replacement Warranty. *4340 Chromoly Material High strength and ductility *Dual Heat Treated puts the strength precisely where designed *Torque Equalizing Diameters helps eliminate u-joint failure