Traction is paramount to ensure you enjoy the exhilarating experience of being in the great outdoors!  Designed to provide 100% traction on demand, ARB Air Lockers allow you to tackle the toughest terrain. As the world’s premier traction aid, ARB Air Lockers keep you moving in all conditions.
Click here to check out How Lockers Work or call into our showroom and try out our demonstration model.

Many people believe that a 4WD and traction go hand in hand – you can’t have one without the other. However, your vehicle’s standard (or open) differential is designed to allow each wheel to turn independently, thus eliminating binding during turns. Off road, this becomes a major  burden as engine power will take the path of least resistance, which occurs  at the wheels with little or no traction. Newer vehicles with limited slip differentials may offer some improvement, but more often you’ll find the slipping is not ‘limited’ enough to maintain forward progress. Automatic locking differentials also have their disadvantages. Aside from being noisy when disengaging, they can also upset the on road driving characteristics of your vehicle.

Created to provide 100% traction on demand, without sacrificing any of your vehicle’s on road driving performance, ARB Air Lockers employ
a 12V air compressor designed to activate (and deactivate) a solid and durable locking mechanism inside the differential. This gives you the traction you need, when you need it, happening all at the flick of a switch, and all within the safety and comfort of the driver’s seat. The  advantage of ARB Air Lockers lies in the pneumatically operated locking system, that when activated, prevents the differential gears from rotating and therefore prevents the axle shafts from turning independently of each other. With both wheels tied directly to the rotation of the crown wheel, the vehicle maintains maximum possible traction at all times. When unlocked, it provides all the safety and predictability of a conventional ‘open’ differential.

In addition to providing outright improvements to a 4x4’s off road capabilities, an Air Locker offers significant environmental benefits. An Air Locker equipped vehicle can be driven in a slower, safer and more controlled manner, greatly reducing the likelihood of vehicle damage and environmental impact.

Air Lockers are currently available in over 100 configurations to suit a wide range of 4x4 vehicles from around the world, and can be installed in both the front and rear axles. Installation should be performed by a qualified differential technician to ensure optimal performance. ARB also offers three compressor models suitable for Air Locker operation, two of which can also be used to inflate tyres and other equipment. For total peace of mind, all ARB Air Lockers are backed by a comprehensive, five year, unlimited kilometre warranty.

Clutch Gear
ARB’s patented locking system actually supports the side gear teeth, giving you more torque handling capability, exactly when you need it.

Pinion Gear
Combining the strength of forged nickel alloy steel with redefined gear tooth geometry, ARB has revolutionised locking differential gear design to yield structural advantages of up to 30% over commercially available high strength gears.

Cross Shaft Retaining Pin
Custom made one piece hardened retaining pins lock into the assembly using a tapered thread junction.

Forged Gears
With phenomenal forces being applied to the side and pinion gears within the differential, ARB has invested heavily in the application of forged gears, typically found in heavy duty commercial, race and agricultural transmissions.

Spider Block
A billet machined alloy steel spideR block supports the cross shafts, using the torque applied at each shaft to support the next shaft along.

Long Cross Shaft
Alloy steels and performance surface technology make for a high pressure running fit that can handle an enormous amount of punishment

Splined Side Gear
High grade surface treatments, forged nickel alloy steel and ARB’s patented timed locking system make this the most ‘lockable’ gear in the industry.

Return Spring
Instead of a complex external actuator system to engage/disengage the locking mechanism,ARB Air Lockers use up to 12 return springs to support the entire profile of the locking gear for a fast, positive and independent disengagement.

Diff Case
Fully machined one piece nodular iron diff carrier case offers the rigidity of a one piece factory differential with twice the  standard number of pinion gears to cope with the torque.
Air Supply
Activated using a dash mounted switch, compressed air is delivered to the seal housing assembly via a nylon air line.

Two Piece Design         
Machining a case from two pieces instead of three results in a much higher dimensional accuracy of the finished assembly and has allowed ARB engineers to improve the design of other elements, resulting in a reduction of moving parts, increased strength and a more responsive activation.

Bonded Seal
Steel reinforced, elastomer bonded annular seal has been proven to handle 20,000+ cycles under the most extreme climatic temperatures.

Flange Cap Assembly       
Fully machined nodular iron flange cap incorporates the stationary side of ARB’s tough, proven and patented timed locking mechanism.

Click Here to Check Out Lockers in Action

Check Out ARB Lockers

ARB Differential Cover

An ARB Differential Cover will protect your Diff against the hazards of competition or extreme off-road use