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Old 08-17-2001, 09:54 PM   #1 (permalink)
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Question Auto tranny vent

I have a 98TJ 4.0 with the 3spd auto, which was recently filled with water. I have heard of people extending the vent, does anyone here have any pics/info? I really don't want to have to change my tranny fluid every time I wheel.
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Old 08-17-2001, 09:58 PM   #2 (permalink)
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I extended the breather on my NV 3550, but I've read that you can't do it on the auto because of fitment reasons. Don't have any hands on experience with the auto though. If it is possible, I can try to answer any questions you might have about making the breather. Getting my hands to the breather was the biggest PITA for me.

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Old 08-17-2001, 10:08 PM   #3 (permalink)
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I have heard of it being done, but it is supposed to be a seriuous PITA. I don't mind the work, after all it has to be better than changing the fluid every time you go through water. I suppose I should actually go have it flushed after every submersion since just draining won't empty the whole system. That would get expensive really fast!
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Old 08-18-2001, 07:56 AM   #4 (permalink)
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The vent is inside the bellhousing near the top. The problem I see is you would have to cut a hole in the bellhousing to bring the vent tube out.
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Old 08-18-2001, 11:43 AM   #5 (permalink)
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when i toasted my tranny after a water crossing, i had the shop that rebuilt it add a breather extension. you have to drop the tranny to do it with an auto. also found out that the clutch material or glue or something is waterbased and after 3 minutes of water starts to disentegrate. trust me, don't drive far after getting water in the tranny - it get's real expensive, real fast.
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Old 08-18-2001, 02:54 PM   #6 (permalink)
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So is there any way I can make this a weekend project and do this myself, or am I gonna have to take it to a transmission shop? It is my daily driver and I drive to and from trails, so I am left with no choice but to drive after a water crossing. I want to take care of this now, before I damage my tranny. How much did they charge you for the added breather? Any more suggestions?

[ 08-18-2001: Message edited by: Philariasis ]
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Old 08-18-2001, 02:55 PM   #7 (permalink)
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I wrote a shabby article years ago about relocating the vent on a TF727 ( which is pretty much identical vent wise to your 32rh thingy)

I did it while rebuilding hte tranny, total dissassembly.

you can remove the tranny from truck, remove converter and plumb it in with the trans still put together but it will involve drilling the bellhousing to do it this method, and its really a headache to get it to clear hte converter ( no room there)

on mine I screwed a threaded plug into the existing vent and drilled a new hole in teh top of the tranny case, added a brass nipple, and ran a hose to the glovebox.

the article is on SWB.COM I think,sorry I dont have a link handy, I do have some pictures of the process hanging around if you really need more of an idea how to do this, it isnt hard to figure out once your trans is apart.
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Old 08-18-2001, 07:54 PM   #8 (permalink)
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im interested in those pictures. <IMG SRC="smilies/biggrin.gif" border="0">
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Old 08-18-2001, 08:10 PM   #9 (permalink)
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I did mine the same way. There is less than 1/4" between the pump and the converter, so I dont see how you can put a fitting on there. I drilled and tapped my case right where the 2nd gear band goes. This seems to keep fluid from pukin out of the hose. I have pics too...somehwhere
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Old 08-18-2001, 08:17 PM   #10 (permalink)
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Come on guys, show me some pix! I have worked on most every area on a vehicle EXCEPT an auto tranny. So any pics/writeups are appreciated.
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Old 08-18-2001, 09:29 PM   #11 (permalink)
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yes, for sure locate the new hole over the kickdown band and not over the uncovered rotating stuff, or its hard to keep it from squirting fluid out!

mine puked some, so I added a loop to teh vent hose, and a $2 fuel filter on the end, problem solved

I cant find my pics, no longer does photopoint keep my p[ics for free, Ill try and find and scan them tomorow for you, but im telling you its simple, once you get it apart and look at it.
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Old 08-19-2001, 10:57 PM   #12 (permalink)
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You can do it in a day easy. Pull tranny and drill a hole in the bellhousing. I would tap it put a bulkhead fitting in it but you could also just run a hose through the hole and RTV around it all quick and dirty style.

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