diff lockers

If the Lokka is in the front diff then fit AVM manual hubs on the front wheels. I have a LOKKA in my front diff. 04 Hilux. I don't know if it squeels because it has auto diff disconnect with 4x4 select on the fly. This is standard in my vehicle. After fitting a Lokka I fitted manual hubs as well. They do not have auto hubs. They have live hubs with a disconnecting device on one side of the diff which is operated by the button on the gear shift.

If its a detroit it should go clunk if you go to hard on the tar,
A locka any brand is as I understand it a unlocka and is designed to un lock on hard surfaces. (I think)

All the best
Eric

I assume you are talking about the Lokka as sold by 4wd Systems in Adelaide. I have one in the front of my Hilux and it does not cause any squealing of tyres or any other problems when going around corners. I have free wheeling hubs but I have driven it many times with the hubs locked but in 2 wd on sealed roads with no problems.

Can you hear it clicking as you go around corners? If you can then the outside wheel is turning faster than the other and the diff is not locked. That is the way it is supposed to work.

If there is no clicking then it may have been installed with incorrect clearances and can not release. That is a major problem if that is the case. You can check it by hand though. I am a long way from home at the moment so I don't have the instructions with me but I think I can remember them.

Lock your hubs if they are free wheeling, engage the front axle and put the transmission in gear. Jack up one wheel and turn it backwards firmly and hold it there. It should not turn. Lower the jack while holding the wheel back and chock it. Jack up the other side and you should be able to turn the wheel forward. You will hear and feel clicking as you do this.

You must go through this procedure four times. You turn each wheel forward while the opposite one is held back then turn each one backwards while the other one is held forward.

If it clicks during all four tests then the diff is working normally and should not be causing problems on corners.

This clicking as the engaged teeth in the diff slip up and over each other is going on all the time because the front wheels rarely turn at exactly the same speed no matter where you are driving. You wont hear it though unless you are turning around a fairly sharp corner. I have found you need a a bit over a 1/4 turn of a turn on the steering wheel on an open sealed road to hear it.

It never completely unlocks and reverts to an open diff because one wheel is always being driven at all times. If one or both wheels loose traction at any time though, the diff will lock fully in an instant.

If the diff passes all tests, you can still get squealing on corners. This is common even on 2 wd cars. Low tyre pressures can cause it but the main offender is wheel alignment. Incorrect toe in or toe out will cause it but this can be correct and you will still get squealing if the toe out on turns is out. This is caused by a bent steering arm and will cause a wheel to turn either too far into a corner or not far enough.

You can often detect toe in/out wear on the tyres by running your hand across the tread from one side to the other. If the surface feels smooth one way and like saw teeth the other way then you have problems. This is sometimes difficult to detect though if you are running aggressive mud tyres.

Brian

Sometimes it's just the tyres that are on the vehicle.

My wife's Forester with the OEM tyres on it did exactly the same thing. U turns & roundabouts were the worst culprits.

Now it's got Coopers SLE's on it instead of the Yokohama Geolandars that were on it when it was new, no more problem.

I'd suggest that what you are describing has nothing to do with the Lokka's. These should be unlocking when you turn corners anyway.

Dave

i have fount and rear lokkas its the ones from Adelaide

im getting some new tyres when Ican afford it nealy worn out so hoping that it helps btw I have a 91 Hilux if that helps