GM Chevy 8.2" 10-Bolt Rearend Posi Unit - 28 Spline * New GM Chevy 8.2" Posi Unit - 28 Spline Axles * Eaton-Style (clutch) Posi Unit * Fits 3.08 & Numerically Higher Gear Ratios (3.36, 3.55, 3.73, 4.11, etc) * 25 Spline Pinion * Nodular Iron Casing, Heavy Duty Composite Clutches & Forged 4130 Internals