Rear Axle Bearing and Seal Kit by Yukon Gear and Axle. Yukon axle bearing and seal kits are specially designed for each application and use all high quality bearings and seals. This axle bearing and seal kit services one side only. Yukon axle bearing and seal kits are specially designed for each application and use all high quality bearings and seals. This kit includes Timken bearings and races along with high quality seals. Unit is sold per side and is covered for one year against manufacturing defects. This axle bearing and seal kit services one side only.