Revolution Gear and Axle's Master Install Kits come with all the necessary parts to ensure your differential job is a success. Our Master Install Kits come with top quality Timken Bearings. Our Kits also include: Pinion seal, Pinion Shims, Carrier Shims, Pinion Nut, Gasket or Sealant, Preload Shims or Crush Sleeve, Ring Gear Bolts, Gear Marking Compound and Loctite.