Closed style breating systems

[Stomis]

Ok so I want to use these: http://www.polyperformance.com/shop/PSC-Vent-Bellow-p-17158.html

On my trans, tcase, and diffs.

I've read alot of stuff about how they work but people say they arent good for anything that will run highway speed and heat up. I was thinking about running 2 of these T'd on my tcase and trans to take up for the extra amount of space/fluid inside them.

What do you guys think? I really like the idea of not having to have lines snaked all over under my truck and especially my axles BUT I do not want to wind up pushing fluid past the seals because theres not enough room in them to vent.

 

[k20]

I would worry about it cracking as I assume its probably a hard plastic (kinda like the bellows style plungers). Anyway, constant vibration under the truck, cold winter day, I could see that thing cracking. I would stick with the vent lines running under the truck to the highest possible point.

 

[Stomis]

I would worry about it cracking as I assume its probably a hard plastic (kinda like the bellows style plungers). Anyway, constant vibration under the truck, cold winter day, I could see that thing cracking. I would stick with the vent lines running under the truck to the highest possible point.

Theyre suppose to be a soft rubber. I wasnt worried about them cracking themselfs. More so if they will vent enough air. I think I'm gonna tube the trans and transfer case and try these on the axle.

 

[Fordum]

I think its a solution in search of a problem myself.
They should work ok I suppose. They will increase the pressure in the case, but if they are soft rubber, the increase should be almost unmeasurable.
Its just that anything that is not open to the atmosphere is going to cause some pressure when it heats up.

I suppose if you put them on with the fluid hot, either from running or sitting in the sun all day over asphalt.
And then hit an icy mountain stream, it might create a vacuum and suck some water in through the seals.
But even that is unlikely from what I can tell.

Personally, I think if you were worried about hoses, you could strap them down so they did not show too bad.
And if you were worried about dirt, just terminate them inside the air cleaner.
But, if you like them, go for it.

J.

 

[Stomis]

Well it just seems like a simple solution to not have hoses running all over...

Like I said I think I'm gonna use them on the axles and hose the trans and case.

 

[Fordum]

Well it just seems like a simple solution to not have hoses running all over...

Like I said I think I'm gonna use them on the axles and hose the trans and case.

Don't know where you wheel, but if its rocks and stuff, then it might be ok,
But, if its mud, swamp and bushes, you might want to either rethink the axle one, or carry a spare hose just in case.

Without having one in hand, I can't tell how tough it is. I have torn off rubber brake lines in limbs and bushes before, so this soft looking thing might not handle being dragged through deep mud.

If it came off or tore, you could put the hose back on to minimize the amount of crap that got in.

J.

 

[Stomis]

Don't know where you wheel, but if its rocks and stuff, then it might be ok,
But, if its mud, swamp and bushes, you might want to either rethink the axle one, or carry a spare hose just in case.

Without having one in hand, I can't tell how tough it is. I have torn off rubber brake lines in limbs and bushes before, so this soft looking thing might not handle being dragged through deep mud.

If it came off or tore, you could put the hose back on to minimize the amount of crap that got in.

J.

Ya know I didnt think of that. I'm not gonna use them for exactly that reason...

 

[blazinzuk]

They work I really don't know if they will blow off if your rig is on the highway for a long time. I don't think so I know of a couple daily driven toys who are running them. Mud isn't their main thing but they do venture there every now and again. So they seal up and let stuff breath, which is exactly what they are supposed to do.

As far as lasting they are under the truck hardly ever exposed to UV. Just to mud dirt and other things, they seem to last a while