Yukon Master Overhaul kit for Chy 9.25" front diff for 2003 & newer truck. Yukon Master Overhaul kits give you all the high quality parts you need to start & finish every differential job. This kit uses Timken bearings and races along with high quality seals and small parts. Yukon Master Overhaul Kits give you all the high-quality parts you need to start and finish every differential job. Yukon offers more tailor-made kits than any other manufacturer in the industry to meet your specific installation needs. This kit uses Timken bearings and races along with high quality seals and small parts. Yukon Master Overhaul Kits are the most comprehensive and complete kits on the market because Yukon does extensive research to ensure that every kit has everything you need for your application.