Difflock

[Deleted Member D]

Interesting & useful

Found this place today.
http://www.4x4abc.com/ML320/ml320_traction_etc.html

 

[Toolbox]

Is it possible to have one wheel drive ?
If it was, how would the vehicle perform ?
When cornering would the wheel try to spin if turned to the direction of the drive wheel ?
In this case the right rear.
It was the left rear that was stuck in deep snow.
Cos Im now thinking that it cant be stuck in difflock because surely I wouldnt be able to reach a normal speed on the road ?
So Im thinking perhaps Ive lost drive from my left rear wheel now.
Spoke to a LGV mechanic last night and he said the difflock should disengage despite being broken.
He said perhaps be best to check diff oil and refill. What oil is in diff on a trol ?
Im trying to find out as much as pos b4 I approach a repair job.

The only way you would get one wheel drive, would be if you had broken a half-shaft or the like and then to move forward on the other wheel the differential would either need to be jammed up/mangled or the diff lock would need to be in.

The simplest way to check what is happening, is to jack one wheel up with the hand bake off and the transmission in neutral, then turn the wheel which should turn and will also turn the prop shaft at the same time. If this is ok, get some one to try and stop the prop from turning at the same time or put in gear that will then prevent you from turning the wheel, if this works it is ok, then try the other wheel in the same manner.
If you cannot turn the wheel with the trans in neutral then jack up both the wheels and turn one, if both the wheels turn in the same direction when turning one and the wheel not being turned cannot be stopped or turned in the opposite direction to the one being turned then the difflock is in or the diff is mangled:doh internally preventing it from working.

 

[Deleted Member D]

Tested (again)

The only way you would get one wheel drive, would be if you had broken a half-shaft or the like and then to move forward on the other wheel the differential would either need to be jammed up/mangled or the diff lock would need to be in.

The simplest way to check what is happening, is to jack one wheel up with the hand bake off and the transmission in neutral, then turn the wheel which should turn and will also turn the prop shaft at the same time. If this is ok, get some one to try and stop the prop from turning at the same time or put in gear that will then prevent you from turning the wheel, if this works it is ok, then try the other wheel in the same manner.
If you cannot turn the wheel with the trans in neutral then jack up both the wheels and turn one, if both the wheels turn in the same direction when turning one and the wheel not being turned cannot be stopped or turned in the opposite direction to the one being turned then the difflock is in or the diff is mangled:doh internally preventing it from working.

I read your post this morning and it sparked me into going outside and do the wheel test a third time. Im glad I did. Both wheels turned and turned the propshaft. Which got me pondering as to what it could be that is locking the tyres in that manner. I wondered if it could be anything to do with the ABS ? Or even some thing to do with when the ignition and engine are turned on ? So I first did the test again with the engine running. Again both wheels turned the propshaft independently. Then I pulled the fuse on the ABS and went for a test drive.
Everything was fine, problem sorted.
Later on after driving around on and off for a few hours it started again asthough difflock engaged. But then within half an hour I heard a tippy tappy noise and everything fine again.
So could it now be something to do with the ABS ? Or do I have a fault within the the diff that will keep engaging the difflock ????????????
Thanks for sparking me into action this morning tho.

 

[Thomas-the-Terrano2]

one wheel drive, yes, sort of with a Detroit locker.

as i understand neither wheel can spin slower well thir halfshafts
than the input prop. so wheel that has farthesst to go ie the left
on a right hand bend is dragged or free wheels sort of. gather
there is a lot tyre (tire) chirping going on then with this set up.

yanks use them in mussel cars and trucks as famed for being
bullet proof, one down from welding the diff. not for use on front
axle ever unless truely protected by manual free wheeling hubs.

 

[Thomas-the-Terrano2]

I read your post this morning and it sparked me into going outside and do the wheel test a third time. Im glad I did. Both wheels turned and turned the propshaft. Which got me pondering as to what it could be that is locking the tyres in that manner. I wondered if it could be anything to do with the ABS ? Or even some thing to do with when the ignition and engine are turned on ? So I first did the test again with the engine running. Again both wheels turned the propshaft independently. Then I pulled the fuse on the ABS and went for a test drive.
Everything was fine, problem sorted.
Later on after driving around on and off for a few hours it started again asthough difflock engaged. But then within half an hour I heard a tippy tappy noise and everything fine again.
So could it now be something to do with the ABS ? Or do I have a fault within the the diff that will keep engaging the difflock ????????????
Thanks for sparking me into action this morning tho.

when you turned one wheel, did other turn in same direction or opposite. on an open diff should be opposite, turning together both forwards suggests issue with locker.

 

[Deleted Member D]

One wheel at a time

Didnt do the both wheels at same time cos didnt think it necessary due to both wheels being able to turn the prop independantly.
Seems to be ok now tho.
But may get Nissan to check especially the ABS set up. Its booked in for wedsdy anyway.

 

[dinky]

Hows the patrol Dadba,do you need a vet seeing its lame.

 

[Deleted Member D]

Cancelled

Hows the patrol Dadba,do you need a vet seeing its lame.

Dint take it in the end as everything seems ok.

 

[elty001]

Dint take it in the end as everything seems ok.

sounds like your motor had a case of mystery illness a bit like mine had over christmas.
glad to hear its o.k now:thumb2

 

[Deleted Member S]

Your troll has prob got a bug due to being near LR's:lolmine plays up every time it gets to close to one:augie

 

[Terranosaurus]

Dint take it in the end as everything seems ok.

you still got ABS fuse out?

 

[Deleted Member D]

you still got ABS fuse out?

Unfortunately for the time being.

 

[Deleted Member D]

ON A Y 61
GL5 SAE 10/40 i got 20 litre drums from my local tractor service place (fife tractors )
Front diff 5.4 litre
Rear diff 3.0 litre
and got a
http://www.machinemart.co.uk/shop/product/details/cgg500-500cc-oil-suction-gun/path/
to refill it

Just had my rear diff oil changed.
2.4ltrs of 80w/90.
Put ABS fuse back in too and so far so good. Fingers crossed job sorted.

 

[lacroupade]

dadba where did you get your oil? my mobile mechanic (who is straight as a die) is doing my diff and says the only place he is being told he can find the right oil is Nissan - he's still looking though...

 

[Terranosaurus]

Tony's uses different oil as his is a patrol with a locker not an LSD - your mechanic is talking out of his backside.

 

[lacroupade]

so any LSD oil of the right grade will do?

 

[Terranosaurus]

Any API GL5 compliant LSD oil of a suitable grade.

80w/90
75w/90
85w
80w

 

[lacroupade]

Thanks T. :bow

 

[Jocky]

Try Miller Oils thats where I got mine for my T2:thumb2

Millers CRX LS 80w-90 Gear Oil for LSD, 5Ltr