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

Paul B of SA
Toyota Prado
Took the Prado to Saunders Gorge over the weekend for a little Lokka workout. Rutted and Rocky with some reasonable hill climbs. Lots of loose stuff and the rain had left some marks on the track as well. Lokka performed faultlessly, made the whole task of getting up some steep shaley inclines effortless. My mate Adrian came along as well with his 100 series Lokka's front and rear and he was really impressed as well. Much happier to ease up some of these rutted rocky slopes than use momentum to get through.

Rod B of WA
Toyota LCR HZJ105 1999

Oh, and by the way, I bought from 4wdsystems your Lokka diff locks for the front of my Hilux some two years ago and they have made a world of difference to the offroad performance of my vehicle. I now have no fear of tackling any 4wd obstacle, knowing I can easily get through (well, more often than not). The downside is I spend most of my time towing my mates out of trouble who cant get through!


Matt C
Toyota LCR HZJ80 1998

I bought lokkas from u guys and love them.

Looking at adding more power to the 1 hz and really leaning towards the intercooled turbo you sell as my lokka experience has been fantastic so I want more of that!