Diff lock 0 power

Hey,

I've had a quick search and can't find much, but when I go into diff lock I get nothing, just pure revs of nothing. No grinding, no rattling from transfer box.

Any common issues I should lookout for before taking the thing out?

LT77 gearbox, 300tdi engine

Thanks in advance

Stiff /sloppy linkage not engaging properly would be the first guess. I take it it works fine low/high out of diff lock?

J

If I understand you, when you engage diff-lock (stick to left) you get no drive, but unlocked you get drive ?

miktdish said:

If I understand you, when you engage diff-lock (stick to left) you get no drive, but unlocked you get drive ?

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yeah

As per Mr @marjon then, your linkage is sloppy and its not rotating the lever far enough..
Take the centre cover off and you will see it on top of the LT230.

Heres the lever ... it's the bit on the bottom, with the linkage

miktdish said:

As per Mr @marjon then, your linkage is sloppy and its not rotating the lever far enough..
Take the centre cover off and you will see it on top of the LT230.

Click to expand...

miktdish said:

Heres the lever ... it's the bit on the bottom, with the linkage

View attachment 299306

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Cheers I will take a look this week and report back!, are these common for failing? is it just a case of something is loose?

What year is your defender ?
1990 ?
Well it's not that common as it's the first time in 33 years

miktdish said:

What year is your defender ?
1990 ?
Well it's not that common as it's the first time in 33 years

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1990, however previous owner done some **** to it in the past.. i forgot the name.. where you throw tons of defender bits together from other things like discoveries etc.. please remind me

RustyDefender said:

1990, however previous owner done some **** to it in the past.. i forgot the name.. where you throw tons of defender bits together from other things like discoveries etc.. please remind me

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Pigs ear, bitsa', bodge job, mash up, hodgepodge, gallimaufry, salmagundi...or a right old mess

As per @miktdish , remove tunnel + clean up the years of crud baked to the hi/lo & difflok linkages and the top of the gearbox [hot soapy water and Gunk is your friend for this], clean with brake cleaner/free up and grease up linkages and adjust as per Mike Britannica's video.

Engaging diff-lock shouldn't make it go out of high or low range.
The lever itself may be fouling on something- enough to move it forward or backward and disengage drive.

RustyDefender said:

LT77 gearbox, 300tdi engine

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Doubtful, the 300Tdi had the R380 gearbox. Although difflock is not directly related to either. Where is reverse, is it upper left or lower right on the shift gate?

RustyDefender said:

I've had a quick search and can't find much, but when I go into diff lock I get nothing, just pure revs of nothing. No grinding, no rattling from transfer box.

Click to expand...

Are you sure you are trying difflock and not attempting to put it in low range? Diff lock will not disengage any drive.

300bhp/ton said:

Are you sure you are trying difflock and not attempting to put it in low range? Diff lock will not disengage any drive.

Click to expand...

GRATCH said:

Engaging diff-lock shouldn't make it go out of high or low range.
The lever itself may be fouling on something- enough to move it forward or backward and disengage drive.

Click to expand...

To get from unlock to diff lock many will follow the H gate and take the LT230 into neutral, to move stick over to lock position then select low or high. As opposed to just moving the stick to the left.

But at the end of the day if it doesn't do its full travel it could be left in the middle of lock/unlock, or the low/high also has an issue.

But I am sure we can all agree that the linkage is probably worn/stuck and needs looking at .

J

Will let you guys know the outcome this weekend when i get the chance to have a look, thanks for the help.. I have the feeling linkage is just stuck and refusing to budge