why isn't there a rear disco that's air actuated?

[blacksheep10]

I'm racking my brain trying to come up with a good air actuated disco. I don't mean a mechanical disconnect with teeth and an air cylinder on it, I mean a normally closed system that's most likely spring held or other, that can be released with air or other fluid, and is seamless in the middle. Okay, it has to be a sealed unit. how do you do a 1:1 in/out with clutches that won't fail and is normally closed. its not a planet set like in the lovell where you have a band on the ring gear. that's the smoothest one of all. problem is, planetary gear sets are geared. I need a 1:1. problem with teeth (like on a 205, teeth on the face of the gear and a matching set splined on your shaft that lock in/out) is that they're just that, metal teeth. you can slam them in at full rev too many times and expect them to keep working. I don't want to rely on a set of clutches like in a quad or an auto becasue clutches fail. in a quad, they are wet clutches that are spring actuated, normally closed, made for motor oil, and disengaged with a push rod actuated by a clutch cable or hydro power. that's great for lower torque apps, but this could be after a 7+:1 reduction with a v8 spinning it. look how big the clutch on the back of a v8 is before the 2.5 or 3:1 tranny and the 2:1 up to 5:1 tcase gets at it. maybe I am stuck with a modified gear type that has less teeth.
this would be useful to anyone without a lovell and very useful to the guys with mid engine and rear engine cars without a normal tcase (ie, axles as the tcase, or transaxle as tcase.). I said cars. I'm such a fag.
how to do this with a band. how to make it normally closed (you don't have to have fluid pressure to keep the **** from rolling off/dont lose power when you lose pressure from a torn line, etc).

 

[muchado]

study how an ARB works and get back with me

Not saying that to be a ****, but they had working demo differential at an offroad shop and just seein how it works got my wheels spinnin' because I'd never understood until I saw the movnig parts snap in and out. Mounting and keeping it lubed could be an issue but I think that would be a start.

 

[Bones]

I was going to throw in a car jab and you did it yourself. dammit. I read that and my head hurts.

 

[6uldv8]

Now that's the Kelly I know and love!

 

[InDaShop]

Only thing I can think of is a diff with an ARB in it mod'd to fit the back of a tranny. Maybe a 9" housing?

 

[blacksheep10]

does the arb not turn into an open when unlocked. rob, I know you are just talking about the 2 piece actuator, but wyatt, a whole diff would be open. like on the apache. don't like that thought. I want a welded tcase and a disco for on the fly.