Yukon Gear & Axle SL F9-28-31 Spartan Locker Ford 9 Inch 28 31 Spline

The Spartan Locker by USA Standard Gear delivers reliable traction at an affordable price point. This mechanical locking differential is designed specifically for Ford 9-inch differentials with 28 or 31 spline axles, providing enhanced grip for off-road adventures and challenging terrain.

Key Features:

• Direct replacement for spider gears in standard open differential case
• Innovative spring and pin design eliminates thrust washers for simplified installation
• Couplers and drivers manufactured from high-strength 9310 steel for maximum durability
• Automatic locking action provides 100% power to both wheels when traction is needed
• Compatible with Ford 9-inch rear ends using 28 or 31 spline axle shafts
• Backed by one-year warranty against manufacturing defects

The Spartan Locker operates automatically, engaging both wheels together when torque is applied and allowing differentiation during turns. This cost-effective traction solution is ideal for off-road vehicles, rock crawlers, and trucks that need improved traction without the expense of a selectable locker. Installation can be completed without removing the carrier from the housing, making it a popular choice for DIY mechanics.