Yukon Gear & Axle Yukon Gear Spin Free Locking Hub Conversion Kit For 12-15 Dodge 2500/3500 - YA WU-13 Yukon Gear & Axle Spin Free Kits increase fuel efficiency and reduce maintenance costs. These kits replace the failure prone and expensive factory unit bearings with tapered bearings and races. The... $3,560.99