Hey there classic truck enthusiasts! Got a '64 to '82 Chevy or GMC C/K series, Blazer, Jimmy, or Suburban with a worn-out or howling rear end? This EXCEL ring and pinion set is your ticket to a quiet, strong-running differential. It's made specifically for the GM 8.875-inch 12-bolt truck axle (the one with the 12 bolts on the cover). The 3.73 ratio is a sweet spot – it gives you a nice blend of off-the-line power for towing and decent highway cruising rpm. This set is built tough with a 41-tooth ring gear and 11-tooth pinion gear made from high-strength 8620 steel. It's designed for a standard rotation differential that uses a 3.73 ratio carrier (or higher). The pinion has a 30-spline count and a 1.438-inch shaft diameter for solid torque transfer. It's a direct replacement for a bunch of popular part numbers like USA Standard Gear 36175, Richmond 49-0280-1, and Motive Gear GM12-373. Perfect for a rebuild project, whether you're a seasoned mechanic or having a shop do the precision setup. EXCEL backs it with a solid 1-year or 50,000-mile warranty. Get your classic truck's drivetrain back in top shape!
