LSD modified to hydraulic locker... (1 Viewer)

[BJ40 3B]

Some days ago i found this pictures about modifing an LSD to a selectable locker using a brake or clutch Master Cylinder, but only the pics, and no more info about it. Does someone knows how can it be done or the person who did it?

Diff Interior

Hydraulic Port on the Diff Housing

Air Actuated Hydraulic Master Cylinder

I think that the principle of this is compressing the friction washers of the LSD. And in this case, there's no problem in engaging or disengaging even if you are turning at full throttle or one wheel spinning in the air!

 

[Dirty White Boy]

That's a pretty cool idea. I'd also like to see the inner parts of the diff. If running the same type air over MC, I think it'd be best to have an orifice in the supply line (to smooth out the "unlocked" to "locked" transition).

 

[Texican]

That's got to be an ARB just running on fluid instead of air....an LSD has no provitions or way to actuate them manually.....

 

[Poser]

Some days ago i found this pictures about modifing an LSD to a selectable locker using a brake or clutch Master Cylinder, but only the pics, and no more info about it. Does someone knows how can it be done or the person who did it?

Diff Interior
Hydraulic Port on the Diff Housing
Air Actuated Hydraulic Master Cylinder

I think that the principle of this is compressing the friction washers of the LSD. And in this case, there's no problem in engaging or disengaging even if you are turning at full throttle or one wheel spinning in the air!

Well those pics show alot.








Another 'novelty lock' carrier....



I sure hope someone comes up with a round wheel sometime soon.

 

[bjowett]

One could use hydraulics to load the clutch packs to the point where they could almost lock, maybe totally lock? It looks as though this person found a way to get a small hydraulic cylinder in there to load the packs. Simple, easy, inexpensive? In stock form a spring loads the clutches, this spring can be shimmed to add more preload and more transfer. Hmmmm, if the cylinder could preload the spring, the unit could go from open to just about any percentage of limited slip all the way to lock. Could be a CV joint saver too.... Sweet! Great posibilities might exist here.

 

[ats4x4dotcom]

Making hyd pressure on LSD could be possible, using a thrust bearing which is hyd like off the back of an LS1 with 6 speed, where the thrust bearing is a hyd unit.

But by those pics, it looks like a hyd operated locker to me.

 

[andrewfarmer]

Some days ago i found this pictures about modifing an LSD to a selectable locker using a brake or clutch Master Cylinder, but only the pics, and no more info about it. Does someone knows how can it be done or the person who did it?

I think that the principle of this is compressing the friction washers of the LSD. And in this case, there's no problem in engaging or disengaging even if you are turning at full throttle or one wheel spinning in the air!

Yes - he's a friend of mine. What do you want to know?

You're correct - the principle is to apply sufficient load on the clutch pack that there is no slip. But there is always slight slip, which provides a 'cushion' for the birfs/axles and helps prevent breakages.

The 'instant disengage' helps with steering.

He's also made a ball bearing locker (as opposed to splines) which is good in that it can be disengaged under load. I've one of these in the fron of my 40 for about a year now and it's great to be able to flick off the locker and steer

 

[BJ40 3B]

Can you get more details and pictures of the construction of the LSD Hydraulic locker and the ball bearing locker.
What is the principle behind the ball bearing locker?

 

[andrewfarmer]

The internals of the hydralic are 'secret' (there are other companies trying to copy his work).

The ball bearing locker has an extended side gear with 16 'cups' in it.
The carrier is replaced with a new one with 8 holes in it. There is a sleeve on the outside of the carrier.

The sleeve has a shifting fork connected to an external bidirectional air ram. (mods are required to the axle housing to fit this).
Ball bearings sit in the holes in the carrier. The sleeve is tapered internally. In the 'off' osition, the ballbearings sit in the carrier, and bounce out of the holes in the side gear if they fall in.
In the 'on' position, the sleeve forces the bearings into the holes in the side gear, locking the carrier to the side gear.
Because the balls are round, as soon as the sleeve is retracted, the balls come out of the side gear, resulting in an instant un-lock.

Hope this makes sense...

 

[BJ40 3B]

Do you have some photos of the ball bearing locker that you can post here?
Do you think its possible for someone with all the tools needed to make one of those?

Thanks for all the info!

 

[andrewfarmer]

Do you have some photos of the ball bearing locker that you can post here?
Do you think its possible for someone with all the tools needed to make one of those?

Thanks for all the info!

No pics sorry (mines installed!).
you could make one, but it's not quite as simple as it sounds - the tricky bit is that the half round holes in the side gear need to have the edges ramped just enough but too much. This was the biggest teething issue with them.

But there must be easily 50-60 units out there now.
Price is similar to ARB.

 

[midi73]

could I have the details of the bloke who does the hydralic locker & how much it would be.

 

[andrewfarmer]

Brian Howat - work number +64 4 567 1471

 

[Tapage]

Yes - he's a friend of mine. What do you want to know?

You're correct - the principle is to apply sufficient load on the clutch pack that there is no slip. But there is always slight slip, which provides a 'cushion' for the birfs/axles and helps prevent breakages.

and I thought ( just wondering ) those disk sufer inminent wearout when are used as locker . ?

 

[andrewfarmer]

and I thought ( just wondering ) those disk sufer inminent wearout when are used as locker . ?

No - because when it's locked they're not slipping - so in fact it gets less wear than a std LSD

 

[Tapage]

No - because when it's locked they're not slipping - so in fact it gets less wear than a std LSD

you are right .. it make much sence ..

 

[Jetboy]

I thought detroit had a prototype of the tru track for a while which uses fluid forced through gears to bias the power. I heard they had a cable operated mechanism which would close the passage and lock it up. I guess if this was real they decided against it? I don't like the idea of clutch packs myself, but sounds like a cool idea.

 

[Satamax]

Can't seem to be able to reach the photos!

 

[BJ40 3B]

Now you can! they were removed from the server

 

[Satamax]

I can't seem to understand how it could work.