Front Axle Kits, Rear Axle Kits
Rear Axle Shafts by Alloy USA
and Superior

High tensile strength 4340 Chromoly is heat-treated, tempered and induction hardened to produce these heavy-duty axles that are up to 40% stronger than stock 1040 axles. Each axle shaft is backed by Alloy USA’s™ exclusive ten-year warranty! We use the latest splining technology to produce splines that are stronger than traditional cut splines. The shafts are then precision CNC machined and magnaflux inspected for cracks before receiving a slick black anodized finish. Our front axle shaft kits include everything you need to complete the job: both passenger and drive side inner and outer axle shafts, seals, U-joints and clips.

High tensile strength 4140 Chromoly is heat-treated, tempered and induction hardened to produce these heavy-duty axles that are up to 35% stronger than stock 1040 axles. Rear axle shaft kits include everything you need for your installation: both passenger and drive side shafts, seals, bearings and wheel studs. Upgraded spline counts for Jeep applications: Dana 44 spline upgrades from 30 splines to 30 and 32 splines. To Increase your strength in the Axle, then increase your Spline Count.

Don’t just replace your axle shafts, upgrade them. For less than the cost or an original replacement axle shaft you can upgrade to an Alloy USA™ performance shaft. Each axle is heat-treated, tempered and induction hardened to have twice the tensile strength than stock and is up to 35% stronger. We use the latest splining technology, to produce splines that are stronger than traditional cut splines. To Increase your strength in the Axle, then increase your Spline Count.

Serviceable grease Zerk at each cap allows you to flush grime and fill with grease to ensure that your X-joints will last for when you need them. Dependable cold forged steel composition made of chromium, molybdenum and nickel alloy. Hardened case for excellent wear resistance.

The NEW Evolution Series Super Alloy axle shafts are the ORIGINAL shafts to feature DUAL heat treatment for the ultimate in strength and ductility. All Superior shafts use a cold-formed rolled spline process that produces an axle spline up to 35% stronger than competitive cut splines! Superior front axles also feature EXCLUSIVE Torque-Equalizing Diameter Profiles allowing "short" side axle to have similar ductility or "give" as the "long" side, creating a more reliable axle assembly. Front axle kits feature quality Timken Roller Bearings and Spicer U-Joints