Ultimate 300M Dana 44 Rear Axle Set for Jeep JL Rubicon 2018+ RCV Performance Ultimate Rear Axles simply replace your stock 32 spline Jeep JL's weak Dana 44 (OE refers to it as the M220) axle shafts with a high-strength 300M design that is 100% MADE IN THYour shipping charge will need to be calculated based on the weight of package and destination.