1. The Aussie Locker is a fully automatic and precision manufactured automatic differential locking device that does not require any manual operation to activate. It does not require any switches, external compressors, electrical cables, air lines, or pneumatic controls.
2. The Aussie Locker relies on a simple and highly innovative mechanical design which makes use of two distinct sets of forces, "ground driven" forces acting on a wheel when cornering (forces the outside of the wheel to turn faster) and the engine driven forces through the drivetrain. The combination of these two sets of opposing forces and the unique Aussie Locker design allow the automatic locking an unlocking of the driving gears when a vehicle turns or requires differential action.

A standard differential is designed to perform two main (traction related) operations.

1. Transmit engine power via the drive line to the wheels
2. Allow "differential action", i.e. allow the wheels to travel at different speeds to allow cornering without drive train damage or tire damage

The traditional differential design allows for an infinitely variable rate of differentiation ranging from 50:50 where both wheels turn at the same speed (straight line driving) and a ratio of 100:0 where one wheel spins freely and the other is not driven at all (not what you want to face when off roading).

The traditional differential also allows for all power to be transmitted to the "path of least resistance" which is fine of highways because both wheels have some degree of traction but off road you often require substantial power and in this case even a small difference in traction can result in wheel spin and the subsequent loss of traction.

A limited slip (LSD) differential is simply a standard differential (also called open) with either a fixed bias or dynamic biasing mechanism which serves to only "partially" lock up" the two axles by way of clutch plates or special gear design. However, most require that both wheels still have some traction on the ground to operate and even when new will cause a wheel in the air to spin uncontrollably so as to be completely ineffective where off road traction is required.

The "Aussie Locker" overcomes the traction deficiency of the standard differential so as to ensure that 50:50 power split is achieved when driving irrespective of ground (or in the air) conditions, yet still allowing differential action when required.

The "Aussie Locker" mechanism allows a wheel to turn faster than the speed of the differential that is driving it (differentiation), but never allows a wheel to turn slower than the speed the differential and engine is turning it (traction). Therefore, a wheel cannot ever stop turning if the engine is driving it, but in a corner it can be forced to actually turn faster. Unlike a standard differential, the engine can never drive one wheel faster than the other.

The "Aussie Locker" is positive locking, meaning there is no slippage when locked. There is a mechanically solid engagement of all parts. In contrast a limited slip differential is not positive locking and does allow slippage and one wheel "spin up" i.e. the spinning of one wheel at twice the differential speed while the other wheel having traction remains motionless. With the "Aussie Locker" you get 100% of drive and traction to both wheels.

When you look at the parts in an "Aussie Locker" you will be amazed by the simplicity of the design. It uses less than half the components of others, weighs less and costs less.

Unlike some other types of lockers, the "Aussie Locker" has a locking and unlocking principal that is dynamic. Dynamic in that the more power that is applied, the harder it locks so it doesn't need large bias forces operating on it to keep it locked. The bias spring forces are minuscule and can easily be compressed with two fingers. This results in a locker that is able to lock and unlock easily even when driving on extremely slippery surfaces like mud and wet grass. The locking mechanism is so sensitive that a wheel can be disengaged with one finger when a wheel is jacked up, off the ground. The "Aussie Locker" engineering philosophy is based on two sets of opposing forces but simplified over other automatic locker designs. Basically there are two forces acting on the two gear sets.

1. One acting to unlock the cam and axle gears by the gear tooth design and effects of the ground driven forces acting on a wheel when cornering
2. The other is acting to lock the cam and axle gears due to the camming action of the cross shaft and axle gear due to the 4 dimensional spiral cut cam grove with bearing surfaces under the effects of engine power

Depending on the situation, the locker can either uncouple the driving gears i.e. if the differential force is acting on a wheel to turn it faster than the wheel is being driven by the differential and engine, then that side can freely disengage and unlock providing differential action.

The "Aussie Locker" is by far the lowest cost and value for the money differential locker. The cost reduction is achieved by the reduction in part numbers over competitive lockers, manufacturing process times and investments in high speed machine systems by the manufacturer. In addition, unlike some other manual lockers, the "Aussie Locker" can be installed by anyone who can change a set of brakes. And finally, the "Aussie Locker" is designed and manufactured of such a high grade of steel that you can expect your locker to wear longer than the factory gears in your differential.

The"Aussie Locker" has approximately 1/2 the backlash of some other automatic lockers. The design use specialized low profile gear sets (small, wide teeth) which have almost zero backlash when engaged resulting in smoother operation. Any backlash present in the locker occurs between the cross shaft acting in the grove cut in the cam gear. Because the camming operation is smooth and progressive, rather than sharp and abrupt, it results in well mannered handling characteristics over other automatic lockers.

The "Aussie Locker" design uses a large number of very low profile teeth which collectively do all the ramping and the driving. Engine power is transferred through the flats of all 20 teeth at the same time rather than the original standard differential which has only 2 or 4 teeth driving at a time with all the force being transmitted between two points on the curved surface of the pinion and side gear teeth. The "Aussie Locker" Has 2-5 times greater surface area over which to transfer the engine power. This means that the "Aussie Locker" can handle engine power often found in modified off road vehicles. The design of the locker result in the gears being locked when driving vs. the slipping and sliding that occurs when traditional spider and side gears turn and mesh.

If a wheel can differentiate easily and the locking and unlocking are smooth rather than harsh, the vehicle owner will eliminate excessive tire wear.

Like all automatic lockers, the "Aussie Locker' cannot be used in front axles of constant 4Wheel Drive vehicles. Some vehicle manufacturers offer a part-time 4WD option and automatic lockers can be installed. Some vehicle owners install part-time kits or use free wheeling hubs.

The "Aussie Locker" is made from an advanced alloy