Yukon Gear & Axle SL Spartan Locker Ford Spline Differential Spool

The Yukon Gear & Axle Spartan Locker differential spool line is built for drivers who want fully locked rear-end traction. A spool replaces the open or limited-slip carrier. It locks both axle shafts together so they turn at the same speed. This line suits drag racing, off-road builds and other high-load performance use. The spools are made for Ford differentials and are offered in different spline counts.

Key Features:

• Full-time locked drive: Both wheels receive equal power, which maximizes traction under hard launches and heavy loads.
• Strong construction: Spartan products are made from 9310 steel. They are heat treated and have precision-cut teeth for durability.
• Simple, solid design: A spool has no clutches, springs or other wear-prone internals to fail.
• Trusted brand: Yukon Gear & Axle (USA Standard Gear Spartan line) is a well-known name in drivetrain and differential upgrades.

Because a spool is always locked, it is best suited to racing and dedicated off-road vehicles. Choose the child item that matches your differential and axle spline count.