8.25" CHY 3.91 Rear Ring & Pinion, Install Kit, Posi, 1.618" ID Axle Bearings

8.25" CHY 3.91 Rear Ring & Pinion, Install Kit, Posi, 1.618" ID Axle Bearing. USA Standard 8.25" CHRYSLER, 3.90 Ratio Rear Ring & Pinion Gear Set and Master Install Kit Package, with 29 Spline Yukon Dura Grip Limited Slip Positraction, and 1.62" ID Axle Bearing & Seals. USA Standard Gear Re-gear & Traction Kits are an easy way to dramatical increase performance of a differential in one simple part number. The kits package a ring and pinion set, an installation kit, and a Yukon Dura Grip limited slip positraction unit. Yukon Dura Grips provide smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a high strength nodular case, forged 4320 chromoly spider gears, and composite clutches. USA Standard Gear employs rigorous in-house quality testing and inspections to ensure its gears pass dimensional, material, and fitment testing. Available in a wide variety of OEM and aftermarket ratios, USA Standard Gear ring and pinion sets are ready to withstand the rigors of everyday commuting, trail running, and all types of spirited driving. This kit is a great way to increase traction by upgrading to a more aggressive gear ratio and adding an LSD in one fell swoop.