Revolution Gear and Axle Ring and Pinion Master Install Kits offer a comprehensive bill of material with all the components needed to overhaul your differential ring and pinion gear set. Our Master Install Kits contain the highest quality components from name brands like Timken bearings. Master Install Kits include differential pinion bearings and carrier bearings and are designed to meet the rigorous standards of both daily drivers and performance enthusiasts alike. Whether you’re tackling tough terrain off-road or optimizing your vehicle for the track, Master Install Kits from Revolution Gear and Axle deliver unmatched durability and performance. Upgrading or replacing differential ring and pinions is a labor intensive process. Once you have selected the right gear set, choose a Master Install Kit from Revolution Gear and Axle for a smooth, trouble-free installation and years of reliable operation. Pinion Bearings Included: Yes Bearing Kit Type: Master Install Kit Pinion Seals Included: Yes Crush Sleeve Included: Yes Carrier Shims Included: Yes Pinion Shims Included: Yes Bearing Type: Timken Cover Gasket/Silicone Included: Yes Differential: Dana 30 Ring Gear Bolts Included: Yes Carrier Bearings Included: Yes Axle Seals Included: Yes Fits:Jeep Wrangler JK 2 Door (2007-2018)Jeep Wrangler JK 4 Door Unlimited (2007-2018)