Revolution Gear and Axle D30 Reverse JK Front Pinion Bearing and Seal Kit (No Carrier Bearings) comes with all the necessary parts to install a new ring and pinion set as well as new pinion Bearings. Revolution Master Overhaul kits come with top quality Timken 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.