Air Locker Destruction Test

In order to continually improve the product, our engineers are constantly trying to break Air Lockers. We even built a specialised test rig to allow us to place torques on the Air Locker far in excess of what’s possible in the field. In this static torque failure test, we used a high performance Dana 44, 33 spline diff with the best axle shaft we could get our hands on to put the Air Locker to the ultimate test.

Air Locker Features

Air Locker Features

Diff Case

Fully machined, one-piece nodular iron diff carrier case offers the rigidy of a one-piece factory differential with twice the standard number of pinion gears to cope with the torque.

Diff Case

Fully machined, one-piece nodular iron diff carrier case offers the rigidy of a one-piece factory differential with twice the standard number of pinion gears to cope with the torque.

Flange Cap Assembly

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

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.

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.

Clutch Gear

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

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.

Cross Shaft Retaining Pin

Custom made, one-piece hardened retaining pins lock into the assembly using a tapered thread junction.

Bonded Seal

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

Return Spring

Instead of a complex external actuator system to engage/disengage the lock, 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.

Air Supply

At the flick of a dash-mounted switch, compressed air is delivered to the seal housing assembly via a nylon air line.

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.

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.

Forged Gears
& Two Piece Design

Forged Gears <br>& Two Piece Design
Forged Gears <br>& Two Piece Design

All models include a 2-piece nodular steel housing for rigidity and exacting tolerances, housing four forged and hardened spider gears to handle extreme axle loads. ARB’s patented ‘timed gear’ design and high-temperature resistant seals ensure responsive activation under the most extreme climatic conditions on earth.

5 Year
Warranty

5 Year<br>Warranty

For total peace of mind, all ARB Air Lockers are backed by a comprehensive, five year, unlimited-kilometre warranty. Coupled with ARB’s extensive domestic and international network of stores and distributors, you can be sure we’ll be there to support you in the unlikely event of an issue.

Official Locking Differential of Ultra4 Racing & KOH

Official Locking Differential of Ultra4 Racing & KOH
Official Locking Differential of Ultra4 Racing & KOH

The ARB Air Locker and ARB Air Compressor, are the official locking differential and air compressor of the Ultra4 race series and King of the Hammers, which are regarded as some of the most technically challenging races in the world.

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