Yukon Gear YGK2340 Differential Ring/Pinion Install Kit for Rear Differential

Description

Kit contains a ring and pinion set, positraction unit, and installation parts Fits GM 8.5” differential 30 spline pinion gear 4.56 ratio Includes Dura Grip positraction LSD, 28 spline Coverage includes ’70 to ’81 Firebird Trans Am, ’70 to ’77 GTO, 25 other models, or anything hot-rodded with a GM 8.5” diff