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With ARB state-of-the-art two piece design available right across the range, forged gears for the ultimate in strength and durability, and an industry leading five year warranty, ARB Air Lockers are now better built and better backed than ever before.

The Requirement:

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-highway driving characteristics of your vehicle.

The Solution:

Created to provide 100% traction on demand, without sacrificing any of your vehicle’s highway driving performance, ARB Air Lockers employ a 12 volt 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, all at the flick of a switch, and all within the safety and comfort of the driver’s seat.

The advantage of the ARB Air Locker lies in the pneumatically operated locking system inside the differential. When activated, the Air Locker 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 operates just like a conventional ‘open’ differential.

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

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Design & Engineering

air locker manufacture

Design & Engineering

Recent developments have seen forged gears and an improved two piece design add increased strength and durability, whilst reducing the amount of moving parts to ensure precision amongst components and a much firmer and responsive activation. These additions have also resulted in increased load bearing capabilities.

The design process of an Air Locker involves countless hours of testing. Computerised Finite Element Analysis (FEA) allows the designer to subject each Air Locker design to ‘virtual’ off road driving stress simulations much more extreme than those experienced in real life, including extreme temperatures and harsh wheel spin. Prototypes are tested to ensure the strength of the Air Locker exceeds that of the axles or other driveline components. Finally, field testing is carried out with units being fitted to 4WDs that operate in the harshest environments imaginable. Once this exhaustive design phase is complete, Air Lockers are manufactured in Australia by ARB, and sold throughout the world.






Air Locker Features

Product Features

ARBExplodedAirLockerAir Lockers give you the traction you need, when you need it, all at the flick of a switch.

  • – Provides 100% traction on demand without affecting on road drivability or driveline wear
  • – Vastly improved traction means less reliance on momentum (ie speed), thus reducing the likelihood of vehicle damage and environmental impact
  • – Rapid activation achieved via dash mounted switch
  • – Ultra durable and extremely strong – constructed using only the highest quality materials
  • – Unique, patented ‘timed’ gear set delivers improvements in strength, durability and locking speed
  • – Thoroughly tested and proven design – trusted and used in over 100 countries around the world
  • – Front and rear Air Lockers available for most makes and models
  • – Easy installation and maintenance

Competition Use


Air Lockers In Competition

Of the many ARB products seen in off road competition, it’s the one you can’t see that makes the difference – ARB Air Locker diff locks continue to dominate the world’s toughest off road events.

ARB 4WD equipment is used in extreme off road competition the world over. Our commitment to research, development, design and production means ARB 4×4 accessories set the benchmark for quality and reliability – two things crucial to competition use. So if you need traction you can rely on, rely on ARB Air Lockers… the world’s best already do.





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competition use