Air Locker 31 Spline - Ford 9 inch Rear Axle

The ARB Air Locker 31 Spline for Ford 9 inch rear axles is a driver-controlled, selectable locking differential engineered to provide ultimate traction on demand without sacrificing on-road driveability. When activated, it delivers equal drive to both wheels on your Ford 9 inch rear axle, allowing you to take full advantage of the available traction in all conditions.

A standard 'open' differential is a compromise, designed to allow wheels to turn at different speeds on pavement. Off-road, this becomes a liability, as it directs all power to the wheel with the least grip, leaving you stranded. While a limited-slip differential (LSD) offers a partial improvement, it requires wheelspin to engage and never truly locks. The ARB Air Locker overcomes this by solidly locking the 31 spline Ford 9 inch rear axle at the flick of a switch, providing 100% traction instantly.

This allows you to confidently tackle steep inclines, rocky obstacles, and slippery tracks with your rig equipped with a Ford 9 inch rear axle. When disengaged, the Air Locker functions just like an open differential, maintaining safe and predictable handling on sealed surfaces. Built in Australia from high-strength, aerospace-grade materials, the ARB Air Locker is the durable and reliable traction aid trusted by off-roaders globally for its proven performance.