Yukon Gear & Kit Package for JL & JT Rubicon, D44 Rear & D44 Front, 5.38 Gear. Yukon Complete Gear and Kit Package for JL and JT Jeep Rubicon, D44 Rear & D44 Front, 5.38 Gear Ratio. Yukon Gear Kits combine all the parts you need for your re-gear project. It delivers front and rear ring and pinion gear sets and the proper Yukon Master Overhaul Kits in one single part number. Yukon Gear & Axle high-performance ring and pinion gear sets are the benchmark of quality in the automotive gear industry. Yukon engineers use state-of-the art design, advanced heat-treating techniques, and leading-edge quality testing processes to ensure the structure and surface finish meet exacting specifications and quality standards. Yukon offers its Y.E.S.