GM Chevy 8.875" 12-Bolt TRUCK Rearend Posi - 30 Spline, Gear, Bearing Kit Package - 3.73 Ratio BRAND NEW Chevy 12-Bolt TRUCK Eaton (Clutch) Posi Unit (30 Spline) BRAND NEW Chevy 12-Bolt TRUCK Ring & Pinion (3.73 Ratio) BRAND NEW Chevy 12-Bolt TRUCK Master Bearing/Installation Kit * C-Clip Applications Only * Fits TRUCK Rearends ONLY - Will NOT fit 12-Bolt CAR Rearends