Motive Gear Differential Mini Spool

Motive Gear Differential Mini Spools are a cost-effective, high-performance traction solution for street, strip, and off-road enthusiasts. Designed to replace the spider gears inside your existing open differential carrier, a mini spool permanently locks both axles together, delivering equal torque to both driven wheels for maximum traction without the expense of a full spool or locker replacement.

What Is a Differential Mini Spool?

A mini spool installs directly into the factory open carrier in place of the side and spider gears, effectively tying both axles to the ring gear. This eliminates wheel slip and ensures positive, constant power delivery to both wheels — a proven approach for drag racing launches and demanding off-road applications where uninterrupted traction is critical.

Key Features:

• Replaces spider gears — installs into the existing open carrier without requiring full carrier replacement
• Permanently locks both axles for full-time positive traction
• CNC-machined from high-strength steel for durability under extreme load and high-horsepower conditions
• Engineered to precise tolerances through rigorous quality control for proper fit and long service life
• Race-proven design — Motive Gear products have competed and won at NHRA, IHRA, NMRA, NMCA, SODA, SCORE, BITD, Ultra-4, and NASCAR events
• Multiple carrier and spline configurations available to cover a wide range of popular differential applications
• 1-Year / 50,000-Mile Limited Warranty against manufacturing defects

As a division of Midwest Truck and Auto Parts, Motive Gear brings decades of racing development and state-of-the-art manufacturing to every drivetrain component they produce. Each mini spool undergoes stringent quality assurance testing to ensure correct fit, consistent performance, and long-term durability — whether you're launching at the drag strip or crawling over tough terrain.