Yukon Gear Spool For GM & Chrysler 11.5in / 38 Spline

If you're building a dedicated off-road rig or a serious drag car, a Yukon Gear & Axle spool is a smart way to get 100% traction to both wheels. This spool replaces your factory differential carrier assembly, locking both axles together permanently. It's designed specifically for GM and Chrysler 11.5-inch rear axles that use 38-spline axleshafts. This means you get consistent power delivery to both tires, no matter what the terrain or track conditions are.

Yukon builds these spools from strong 8620 steel, then heat-treats them to ensure they can handle the extreme forces involved in off-road crawling or hard launches at the drag strip. Because it locks the axles, this type of differential is not recommended for street-driven vehicles, as it can make turning difficult and cause tire scrub. This is a component for specialized applications where maximum, unwavering traction is the top priority.

This spool is a direct replacement for your differential carrier, making installation straightforward for someone experienced with differential work. It's a popular choice for trucks like the Chevrolet Silverado HD, GMC Sierra HD, and Dodge Ram 2500/3500 models when converting them for heavy-duty off-road use or competition. Ensure your vehicle's rear axle is the 11.5-inch AAM unit with 38-spline axles before ordering.