Mini Spool 8.5 GM 10Bolt 28spl

The Mini Spool 8.5 GM 10Bolt 28spl from Allstar Performance is a precision limited-slip differential upgrade designed for street and strip enthusiasts running GM 10-bolt rear axle assemblies. This spool locks both wheels together during acceleration, eliminating wheel hop and delivering consistent traction when launching hard or cornering under load. Whether you're building a muscle car, street machine, or weekend track warrior, this component transforms your rear-end's handling characteristics by providing the locked-axle response needed for predictable power delivery.

The Mini Spool utilizes a 28-spline design that mates directly with OEM and aftermarket driveshafts engineered for the 8.5-inch GM 10-bolt housing. By mechanically locking the side gears, this spool ensures equal rotational speed at both wheels regardless of throttle input or surface conditions—a critical advantage over open differentials when traction is marginal. The compact design maintains factory housing integrity, allowing retention of your existing 8.5 GM 10-bolt carrier and ring-and-pinion setup without extensive modification. Weighing just 6.08 pounds, it's a lightweight performance solution that won't add unsprung mass.

This upgrade is ideal for street/strip cars, bracket racers, and enthusiasts who prioritize launch control and consistent cornering grip over on-pavement comfort. Installation requires standard differential service—drain, remove the carrier, and swap the spool into the existing housing—making it accessible for experienced DIY mechanics or professional shops. The 28-spline specification is critical; confirm your driveshaft matches this standard before ordering. Allstar's Mini Spool 8.5 GM 10Bolt delivers affordable, bulletproof traction when every tenth counts.