Thread: 110 centre diff lock not working?

I've had the same issue with a new transfer case recently - the most reliable way to test is to drive hard circles on both loose gravel and also a hard surface - if it is engaged you will get windup. Mine wasn't engaging full stop.

It's a fairly easy process to adjust the diff lock lever to get it working...there are three positions it can be turned in: left, centre and right (or 10 o'clock, 12 and about 2 o'clock). The left position is a dummy one (for want of a better term), centre is disengaged and right in engaged. You need to adjust the pivot point on the linkage so that it travels from centre to right and back again. Also the difflock indicator switch sticks and can possibly be stopping it engaging fully if it is too far down.

A couple of helpful links I found when sorting mine out were:
Replacing an LT230 Transfer box - LR4x4 - The Land Rover Forum
Ashcroft Transmissions

Hope that helps!

jack up the rear diff off the ground (both wheels being a locker) and put it in gear and see if it tries to drive off the jack with CDL engaged, if its not locked it will just spin the rear wheels, BTW you should pull the ABS fuse before trying this being a extreme it probobly has ETC.... perhaps your linkages need adjusting or one of the wires of the sensor has come off or it just needs adjusting..

Originally Posted by cal415

jack up the rear diff off the ground (both wheels being a locker) and put it in gear and see if it tries to drive off the jack with CDL engaged, if its not locked it will just spin the rear wheels, BTW you should pull the ABS fuse before trying this being a extreme it probobly has ETC.... perhaps your linkages need adjusting or one of the wires of the sensor has come off or it just needs adjusting..

Being a Extreme the T/C light should come on if its activating as well

no, it doesnt, if you lock CDL then only the Cdl light comes on the TC light only comes on with differential wheel speed that needs the TC.

T/C and ABS lights should come on if you pull the fuse, maybe thats what he is trying to say?

Originally Posted by cal415

jack up the rear diff off the ground (both wheels being a locker) and put it in gear and see if it tries to drive off the jack with CDL engaged, if its not locked it will just spin the rear wheels, BTW you should pull the ABS fuse before trying this being a extreme it probobly has ETC.... perhaps your linkages need adjusting or one of the wires of the sensor has come off or it just needs adjusting..

Sounds exciting, thanks for the advice.
What are my chances of doing this test without actually driving my landy off the jack?
I'm guessing driving it off the jack would be a bad thing.....
Do I need to chock the front wheels?

Originally Posted by Blknight.aus

no, it doesnt, if you lock CDL then only the Cdl light comes on the TC light only comes on with differential wheel speed that needs the TC.

I did say if T/C is activating the T/C light will come on

my bad must have misread it as the TC light will come on when the CDL is locked....

the best test for CDL functionality is this..

jack the whole front axle with the parkbrake on hard and the main gearbox in neutral

grab the front propshaft and turn it.

if you can turn the front propshaft more than say 1/8th of a turn then the cdl is not engaged.

turning the front propshaft slowly while someone works the control will let you see what the linkages external to the box are doing and feel if the diff is trying to lock or not.