Mini Spool GM 8.875in 30 Spline

The Mini Spool GM 8.875in 30 Spline from Motive Gear is a direct-bolt limited-slip replacement for GM 12-bolt differentials, engineered for enthusiasts and professional mechanics seeking maximum traction and predictable power delivery. Whether you're building a street rod, drag car, or off-road rig, this mini spool eliminates traditional clutch-pack slippage by locking both axle shafts together under load, delivering instant torque to both wheels simultaneously. This product is essential for builders who demand reliability and consistent handling characteristics during acceleration and cornering.

Manufactured from high-grade steel, the Mini Spool GM 8.875in 30 Spline features 30-spline engagement that mates precisely with GM 12-bolt axle shafts, ensuring zero backlash and maximum load transfer. At 6.33 lbs and compact 5.4 x 5.3 x 6 in dimensions, this spool integrates seamlessly into tight differential housings without requiring modification to suspension geometry or mounting points. The rigid one-piece design eliminates the wear, maintenance, and potential failure modes associated with clutch-based limited-slip differentials, making it ideal for high-horsepower applications where consistency trumps compromise.

This mini spool suits racers, hot-rodders, and serious weekend warriors who run 8.875-inch GM 12-bolt rear ends and want predictable traction without electronic intervention. Installation requires removing the factory differential, extracting the spider gears, and dropping in the spool—a straightforward operation for experienced mechanics with access to a lift and basic hand tools. Verify axle shaft spline count and differential housing size before purchase to ensure proper fitment and optimal performance in your build.