LOKKA Differential Locker

LOKKA is a fully automatic Differential Lock that does not require manual operation. It doesn't have switches, external lines, electric or pneumatic controls of any sort.
It relies on a simple mechanical design which makes use of two distinct sets of forces - the "ground driven" forces acting on a wheel when cornering (that force an outside wheel to turn faster) and the forces from the engine (power) turning the differential and axles.

The combination of these two sets of opposing forces and the LOKKA design allow the automatic engagement and disengagement of the driving gears when a vehicle turns or requires differential action.

Wheel slippage or a loss of traction can occur for many reasons off-road and include excess throttle, fast approach speeds, limitations in wheel travel (especially independent front suspension vehicles), weight transfer off drive wheels and slippery surfaces such as mud, sand, snow, shale, wet grass etc.

In many of these circumstances both the normal standard differential and LSD centre will allow the wheels with the least resistance to spin. Thus the wheels with traction do not obtain any real drive and the vehicle will lose speed or stop. LSD centres might assist under these circumstances but only if they are in good condition and only if there is enough resistance on the spinning wheels to activate the clutch pack or gears to force drive to the wheels with traction.
Even a new LSD will allow a lifted wheel to spin freely with no drive to the wheel with traction.

LOKKA overcomes the traction deficiency of the standard differential and LSD centre to ensure that a 50:50 power split is achieved when driving, irrespective of ground (or air !) conditions, yet at the same time still allowing differential action when cornering on hard ground.

Whether fitted to front or rear or both differentials, Traction Performance is significantly improved in all situations.

LOKKA enjoys an excellent reputation for reliability throughout the world – sold in every continent, in all realms of 4x4 and 2x4 performance activity.



Australian Warranty Statement

A 3 Year Unconditional Warranty is provided for LOKKA products.
Free Wheel Hubs in Part Time Conversion Kits have 1 Year Warranty




LOKKA Differential Locker


LOKKA Differential Locker
Lokka Typical Components Assembly Relationship Axle gear, Spacer, Cam Gear

LOKKA Differential Locker
Lokka Typical Components Assembly Relationship Axle gear, Spacer, Cam Gear

LOKKA Differential Locker
Lokka Typical Components

PDF Downloads

Australian 4WD Action LOKKA feature article
Installation 4 Pinion
Installation 2 Pinion
Toyota LSD Replacement

Recommendations

George H
Toyota HLX LN167 2003

It does everything it said it would, locks up both front wheels in any condition and yet when doing the lock unlock test my girlfriend can unlock it with ease one handed. you can only notice that its there when your in 4WD, there is no difference to steering with the hubs in and the little lever in 2wd not a bit. The difference that I can see between a lokka and an air locker (besides being over $500 cheaper)

Is the air locker you flick a switch, lokka you move a lever. Seems like a good deal to me. Fitment is as quick and easy as said, i am very picky so I took a bit longer and I fitted new bearings but I can see it being done in halfa once the diff is out of the car.

I could not hear mine unlocking so if you cant don't worry its just working fine.


Tyson G of WA
Jeep Wrangler JK
Well I started the install Friday and had it all buttoned back up for Saturday morning. The install was fairly smooth other than getting the diff centre out. Tested the system out at a local medium to hard trail here Mundaring Powerlines and they exceeded my expectations. My friend who is a mechanic who assisted me with the installation is now considering them for his 2010 Wrangler JK petrol. At the Jeep Club meeting tonight I will be telling everyone about them

Joseph W of NSW

..... I spent about 4 hours driving around the State Forest looking for the worst bits of track that I could find, eg steep inclines/declines, deep ruts, loose surfaces, rock faces etc and i have to say that I am impressed with the Jackaroo's new capabilities now that the Lokka has been fitted to the front diff.

I also want to thank you both for the outstanding service that you and your company have given me. It is a delight to find a company that stands by its products as resolutely as 4WD Systems and you can be sure I will be giving you some good word-of-mouth advertising.