RCV Performance Ultimate CV Axles simply replace your Ford F-250/350's Dana 60 U-joint axle shafts with a high-strength constant velocity design. These Big Bell CVs are our 2.5 ton Rockwell CVs, but the outer stub is designed to fit directly to the large 32 spline 2005+ Ford Dana 60 Super Duty unit bearing. Eliminating the need for a lock-out or drive flange, increasing strength and reliability.IMPORTANT: CVJ60M-FORD4-40 requires modification to the OEM Ford 2005+ F250/F350 Super Duty knuckles. To clear, Ball Joint eliminator kit and minor clearancing/machining inside the knuckle is needed. Please see our instruction guide here: https://www.rcvperformance.com/media/pdf/BIGBELL_OEMKNUCKLE_INSTALL.pdfFits: 2005+ Ford F250/F350 Super Duty with aftermarket 40 spline locker. Does not fit OEM 35 spline carrier.Ultimate CV Axles also eliminate U-joint binding to allow smooth transfer power to the ground. Even if you have big tires and big power there are no worries. Ultimate CV Axles are low maintenance and operate with a smoothness you can feel - whether off road or on the street. And we back it all with a "No Questions Asked" limited lifetime warranty.Axle set includes right and left CV axle shafts, SST seals and installation tool, installation instructions, synthetic moly grease, and installation hardware. Black oxide coating is standard. Optional nickel plating is available for extra corrosion resistance in salty environments - contact us for details, or use our Custom Axle Configuration Form.Part:Axle Model:Type:OEM Inner Spline:OEM Outer Spline:RCV Inner Spline:RCV Outer Spline:OEM Long Inner Axle Length:OEM Short Inner Axle Length:OEM Outer Stub Axle Length:Boot Technology:'05+ Ford F-250/350 Super Duty. Includes left and right axles.Dana 60Unit Bearing353540Large 3239.01"16.78"7.03" <br />

All RCV products are built to order ship times vary, most items ship in 1-6 weeks, this is an estimate not a guaranteed time frame.