In-Demand Upgrades Built Right In. Engineered for all Jeep Wrangler JKs, 2007 to current, the Ultimate Dana 44 axle is a direct bolt-in solution and requires you to reuse your stock wheel ends. Featuring many upgrades for added on-trail durability, plus added strength wherever you take your vehicle, the Ultimate Dana 44 axle is built to meet the demands of serious off-road enthusiasts.