About the locker
Air Locker breaks new ground by providing an instant and full locking differential supplying 100% traction in the very worst terrain.
Many types of traction devices have been available for years, but until the ARB Air Locking Differential, all were a compromise, performing well either off the road or on the road, but not on both. The Air Locking Differential provides normal differential action on the highway, maintaining safe, predictable handling. Once off the road, by simply pushing the buttons, the Air Locking Differentials lock the axles together providing 100% traction to all wheels allowing you to safely traverse even the most difficult terrain.

Without diff locks, when one wheel loses traction, all the driving torque transfers to that wheel leaving it spinning helplessly. With the ARB Air Locking differential activated you will simply drive out of these situations.

Design and Manufacture
Designed and manufactured in Australia, the ARB Air Locking Differential patented design has proved ultra reliable, even under the most arduous conditions. The Air Locking Differential is certainly very strong, with all transmission components being cleverly designed and manufactured from the highest quality materials. The Air Locking Differential is machined and built at our Melbourne plant using the latest CNC equipment, and assembled under the guidelines of our stringent quality control system.

Applications
ARB manufactures over 80 different air activated locking differential models which suit over 250 different vehicles.

Air Activated
The ARB air locking differential system is supplied as a complete kit. The fast recovery air compressor features industrial grade control switches, air lines and fittings. The compressor also acts as an ideal accessory in its own right, perfect for inflating tyres, air beds and a host of other applications where compressed air is required.

If you\'d like more information about ARB\'s compressor unit please go to the Air Compressor section in the left prodcuts menu.

How it works
The ARB Air Locker is an air operated, driver controlled differential lock activated by pushing a dash mounted button.
When the dash mounted button is pushed, compressed air, delivered by the ARB 12 volt, on board air compressor is passed via a 12 volt solenoid down an air line into the differential housing. The air travels into the differential centre via a specially designed seal housing which seals against an extended bearing spigot.

Via air galleries, the compressed air enters the piston chamber and actuates the piston and clutch gear, moving the gear into the locked position. The clutch gear now locks the side gear to the differential housing instantly stopping any differential action. The diff is now 100% locked, and both axles will deliver 100% traction.

To disengage the differential the dash mounted switch is again pushed, which releases the compressed air via the solenoid and the piston springs return the piston to its original position. The differential is then fully open allowing full, standard differential action.

The ARB Air Locker only takes a split second to engage, making it the only, truly, driver controlled, differential locking system.