Revolution Gear and Axle D44 (Fits 99 Percent of 2003 and Older D44 Models) Master Overhaul Kits come with all the necessary parts to ensure your differential job is a success. Revolution Master Overhaul Kits come with top quality Koyo Bearings and National seals. 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.