Vent tube for Dana 20 transfer case?

While my Jeep was at the muffler shop last Saturday I had some time to look under it quite a bit. I couldn't find any kind of breather/vent tube for the Dana 20 transfer case. Is it supposed to have one? If so, where? Near the top I'd guess, but on the back side or front side, driver's side or passenger side? Thank you.

-- Travis

meek shall inherit the earth. After I'm finished with it.:wq!

You should be able to find the hose attached to the firewall somewhere near the battery. If you follow the vent tube (hose) from the front axle up into the engine bay, you will find it has a small white one-way valve on it at the top. The tcase gets the same kind of hose and valve.

On Mon, 17 Nov 2003 14:38:54 -0800, "CRWLR" shared the following:

From the front axle? I'm not talking about the Dana 30 front. I'm talking about the transfer case. I've seen the one you're talking about for the front diff. I'm just wondering about the transfer case now. There's a *strong* possibility that I'm confused here... :-) Should I have 3 tubes altogether? One for the rear, one for the front, and one for the transfer case? I've found the one for the front and the one for the rear...

up into

Where does that hose attach on the transfer case? Thanks!

-- Travis

meek shall inherit the earth. After I'm finished with it.:wq!

On Mon, 17 Nov 2003 14:24:28 -0800, L.W.(ßill) Hughes III shared the following:

What? My transfer vent hose is connected to my front axle? Oh crap, I'm confused.

-- Travis

meek shall inherit the earth. After I'm finished with it.:wq!

On Mon, 17 Nov 2003 14:43:48 -0800, L.W.(ßill) Hughes III shared the following:

I asked about the vent hose for the transfer case. he said (above) "...if you follow the vent tube (hose) from the front axle up into the engine bay..." which to me sounds like he's saying that the tube for the TRANSFER CASE is attached to the FRONT AXLE. Is that right? I just kinda assumed that there would be a vent hose that was attached to the rear end (there is) and one attached at the front end (there is) and maybe just maybe one attached to the TRANSFER CASE. AGGG!!! What am I missing here? Are y'all just messin' with my head? :-)

-- Travis

meek shall inherit the earth. After I'm finished with it.:wq!

The standard transfer case vent is located on the firewall near the battery. The front differential vent is located on the passenger side near the radiator. Both have the same vent cap on the hose.

Capisch?

Tom

The Ox (Oxide) '86 CJ7, 258 I6, 4 spd, 3" Lift, 33x12.5 BFG's '96 XJ PMS '01 ZJ TS

Reply to: Group, or snipped-for-privacy@spleen.acd.net Remove my spleen to reply. (please be gentle) Home page:

stuff: aint much, but it's mine.

On Mon, 17 Nov 2003 16:34:16 -0800, L.W.(ßill) Hughes III shared the following:

Yes, it is. Get back to me when you're not on those painkillers.

-- Travis

meek shall inherit the earth. After I'm finished with it.:wq!

You don't have a vent tube on your firewall and it isn't missing, you've got the same transmission and t-case in your `76 that I have in my `79. From under the jeep, reach up to the higest point of the transfer case, just above the rear output shaft. You'll find a piece about 3/4" high with a loosely-attached, flat cover on it the size of a quarter. You can wiggle it but it won't come off. That's your vent, and there's one of the top of the transmission too.

On Tue, 18 Nov 2003 04:30:22 -0500, Lee Ayrton shared the following:

OK, thanks for that information. I was about to go crazy trying to understand where my tube from my battery that was tied in a knot around the front axle and hanging out of a spot on the transfer case had gone to and why it was supposed to be hooked up to the transmission through a t-fitting and split off to the valve stem on my rear passenger-side tire. :-P I wonder how much trouble it would be to replace the vents on the tranny and transfer case with tubes with the little vent fittings on the end so that I could go in some

*really* deep water without worrying about getting water in the tranny and transfer case. Has anybody done this?

-- Travis

meek shall inherit the earth. After I'm finished with it.:wq!

I may not know all the history of this post, but here is what I know. A Dana 20 does not have a vent. It vents through the transmission. I have removed the transmission vent (little screen thingy) and plumbed it up to a high spot on my firewall. I did the same thing with the vents from my front and rear axils.

[Vents for the (1976-`79) T-150 tranny and the (1972-`79) Model 20 transfer case]

I don't know, but I think that I'd want to have the cases out (or, the body off of) of the Jeep before trying. The floating caps are probably just crimped on, so you could probably just tear them off and press on a length of hose, but there's not a lot of working room between the top of the output shaft and the body floor. Especially when it doesn't go as planned and gets much much more complicated than you'd originally thought.

I added a 4th tube on mine for the tranny.

I just pulled out that stupid button vent and pressed a piece of steel gas line in to make a nipple for the hose.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

travis wrote:

No transmission shares a vent with anything on any Jeep I have ever seen or heard of.

They both need a separate vent each. They are separate units and don't share oil either. The trannys just plain don't have a vent hose. The later t-cases do have a vent hose.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

I understand what you are talking about. I am explaining the vent tube on the front axle as a means of telling you what the tcase vent tube looks like. If you can find the front axle vent tube, then you can look around on the firewall and find the tcase vent tube. The hose for the tcase is mounted to the firewall in the general vicinity of the battery - towards the motor as opposed to behind the battery.

Yes, you should have three vent hoses, 1 on the rear, 1 on the front, and 1 on the tcase. There is vent for the trans, but the trans has a one-way valve that is physically mounted on the case, instead of having a hose with the valve on the end of it. You could replace the valve on the trans with a hose if you wanted, but if it was really that beneficial, then the factory would have done it in the first place.

What I said was to locate the front axle vent hose, and follow it to the top where you will find the one-way valve. Now that you know what it looks like, look for another one on the firewall. This one will lead to the tcase.