These kits include all the parts that are needed to properly install a ring and pinion.
These G2 kits include hard to find parts like a proper shim kit, replacement pinion nut , crush sleeve, pinion seal, ring gear bolts, silicone sealer, Loctite and gear marking compound. Pinion Nut;Pinion Seal;Crush Sleeve;Pinion Shims;Carrier Shims;Ring Gear Bolts;Thread Locking Compound;Gear Marking Compound;Silicone Sealer;California Residents: WARNING G2 Dana 30 JK Minor Ring and Pinion Installation Kit - 25-2050 these are the parts that the auto parts store never seems to have or ever herd of.