ARB Ford 9-inch Rear Air Locker Differential, 31 or 35 spline SKU: 8731

ARB Air Locker for Ford 9 inch | 31-spline or 35-spline

Conquer any terrain with the legendary ARB Air Locker for Ford 9-inch. Built for extreme off-road performance, this locker provides 100% traction on demand while maintaining on-road drivability. With over 30 years of proven reliability in hardcore wheeling environments, the ARB Air Locker is the go-to choice for rock crawlers, overlanders, and off-road enthusiasts worldwide. Quiet smooth operation on the road with no adverse affects on tires or handling. When you get to the ruff stuff just hit the switch and now you have a fully locked front end, rearend or both. The ARB air locker has been around over 15 years. They have been tested at about every hard-core wheeling spot on the earth and have proven their performance and reliability. So how does it work? Hit the switch and in one tenth of a second compressed air actuates a piston inside the differential which engages a locking gear, instantly locking the differential and directing torque to both driving wheels. Once you get through the hard spot just hit the switch and the diff. lock is disengaged.

Why Choose an ARB Air Locker?

• Instant Traction – Locks the differential at the flick of a switch for unbeatable grip.

• Superior Control – Unlocks when needed, making turning easier on snow, ice, or slick terrain.

• Rugged Durability – Ultra-strong two-piece design with minimal moving parts for maximum reliability.

• Timed Locking Mechanism – Ensures high strength and ultra-fast unlocking for smoother operation.

• Sealed for Extreme Conditions – Steel-reinforced annular seal withstands harsh climates and temperatures.

ARB Air Locker Kit Includes:

• ARB Air Locker differential
• Activation switch
• Solenoid valve
• Air line and bulkhead fitting

⚠ Important Notes:

• Verify spline count before ordering as Ford 9-inch axles vary.
• Air compressor required for operation (sold separately).

Upgrade your Ford 9-inch with the ARB Air Locker and experience the best of both worlds—maximum traction when you need it and open-diff handling when you don’t!