Our 2nd Generation BULLETPROOF Front Differential rebuild package includes the Billet Torsion Spring Retainer, the upgraded 6 Tooth Billet Sprague cage, 6 Tooth 4130 Cage plate, Upgraded bearings & seals. This Rebuild eliminates all of the plastic OEM parts and upgrades all of the internals. Are having Four Wheel Drive engagement issues? Are stuck in 4WD or cannot get into 4WD? Our Front Differential Rebuild is a must needed upgrade over the stock components. However, there’s a few front differentials that need a little extra TLC with 4WD. Our BULLETPROOF Front Differential rebuild package includes the upgraded 6 Tooth Billet Sprague cage, 6 Tooth 4130 Cage plate, upgraded Bearings, upgraded Seals & Tall Rollers. Send your front diff to us and our certified tech will troubleshoot and correct the noise. This price includes installing our upgraded bearing kit, custom shims to set the lash on the ring and pinion gears and also bench load test your diff before we ship it back. ***You are responsible for shipping the diff to us!*** ***Your diff will be shipped with 2 ounces of our justice bros gear oil treatment. Please make sure to top the diff off with oil once you receive it.*** BOMBPROOF FRONT DIFFERENTIAL RE-BUILD - 2015-2016 XP 1000