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anyone know what this hose is for on top of t-case?

Discussion in '1st Gen. Tacomas (1995-2004)' started by shitroc, Sep 16, 2010.

  1. Sep 16, 2010 at 3:41 PM
    #1
    shitroc

    shitroc [OP] Master of War

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    i was crawling around under the truck tonight and seen this hose just hanging down from the top of the transfer case. im not sure what it does or how it got disconnected but i reconnected anyway. who knows how long its been disconnected for.

    [​IMG]

    its kind of a shitty pic but it was pretty hard to get a camera up in there at all. the hose is about 6'' long and from what i seen just comes out of the tcase then goes back in.
     
  2. Sep 16, 2010 at 3:42 PM
    #2
    David K

    David K Well-Known Member

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    Umm... have you been reading TW much? B-R-E-A-T-H-E-R .... maybe?
     
  3. Sep 16, 2010 at 3:45 PM
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    TanSR5x4

    TanSR5x4 Hold my beer and watch this

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    crikey so thats the elusive breather line ive been hearing so much about?

    can anyone else confirm?

    even tho thats certainly what it looks like
     
  4. Sep 16, 2010 at 3:45 PM
    #4
    David K

    David K Well-Known Member

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    Seriously, our gear boxes all have breathers (vents) to let hot gasses out... If they are low on our truck a tube ports the air vent up high so water won't get in... Only our rear differential doesn't have an extended breather... So, we do that ourselves... See link in my signature, as well as 3-4 threads running now on TW discussing the breather mod.

    Have a great day!
     
  5. Sep 16, 2010 at 3:52 PM
    #5
    shitroc

    shitroc [OP] Master of War

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    it doesnt look like a breather though, it goes from one part of the tcase to another
     
  6. Sep 16, 2010 at 3:55 PM
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    AKTacoma

    AKTacoma Dedicated Crew Chief

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    pic of where the other end connects?
     
  7. Sep 16, 2010 at 4:00 PM
    #7
    shitroc

    shitroc [OP] Master of War

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    the other end is just out of view it connects into the same type of fitting. the hose is only about 6'' long and just goes from fitting to fitting
     
  8. Sep 16, 2010 at 4:25 PM
    #8
    4WD

    4WD cRaZy oLdmAn

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    Your probably going to find a breather/vent on any engine/trans/transfer/diff for all those moving,spinning,reciprocating parts that are encased & have a large airgap around them causing the inside to build pressure to a point of blowing seals/causing separation of internal lubricants from the parts they would freely lube had there not been high internal case pressure thats why the breathers are needed pretty sure....:cool:
     
  9. Sep 16, 2010 at 4:34 PM
    #9
    shitroc

    shitroc [OP] Master of War

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    ^ yah i realize that but is that in fact what the hose is for because it sure doesnt look like one is all, there is no where for it to breath being that it just goes from one fitting like the one in the pic to another identical one.

    that pic is taken from the right side of the tcase just for reference
     
  10. Sep 16, 2010 at 4:46 PM
    #10
    David K

    David K Well-Known Member

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    shitroc... have you looked at all the other breather mod photos here on TW? Your photo looks like a union (a barb tube fitting screwed into the t-case or differential or...)... the tube goes from the 'union' to a breather... That looks like a silver cap... it is small.
     
  11. Sep 16, 2010 at 4:54 PM
    #11
    shitroc

    shitroc [OP] Master of War

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    i know what a breather looks like and this does not look like one, even if it is one it does not resemble the ones like on the diffs. how could the tcase do any kind of venting through this hose when it just joins the two fittings,there is no cap of any kind.
     
  12. Sep 16, 2010 at 4:55 PM
    #12
    mikesdoublecab

    mikesdoublecab LT Chase Truck

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    but if you dont know what that hose is, how do you know it goes into that spot?

    :yay:
     
  13. Sep 16, 2010 at 4:59 PM
    #13
    shitroc

    shitroc [OP] Master of War

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    lol it must go there,its exactly long enough,sizes match,plus the fitting where it plugs on to is nice and clean unlike everything else. im just hoping it wasnt doing any harm to anything being off like that.
     
  14. Sep 16, 2010 at 4:59 PM
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    4WD

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    The hose connecting the 2 case parts on the transfer might just be sending the pressure developed by one case into the other & from there maybe venting to the outside I dunno, I'm gonna look at mine now ,ya got my curiousity going.....:notsure:
     
  15. Sep 16, 2010 at 5:00 PM
    #15
    rushr

    rushr Well-Known Member

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    That breather hose connects the transfer case to the air space in the housing between the transfer case and tranny. If you look on the top left side you will see the little check valve breather.

    It may have been disconnected because the breather valve doesn't work and was causing the transfer case seals to leak. Mine did this.
     
  16. Sep 16, 2010 at 5:05 PM
    #16
    shitroc

    shitroc [OP] Master of War

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    so ya think maybe built up pressure blew off the line or something? did this hurt ur tcase in anyway ?
     
  17. Sep 16, 2010 at 5:14 PM
    #17
    rushr

    rushr Well-Known Member

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    Just made the seals and the shifter boot seep oil when pressure built up. Disconnect the tube again and blow into it to see if the valve releases the pressure.
     
  18. Sep 16, 2010 at 5:18 PM
    #18
    shitroc

    shitroc [OP] Master of War

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    ^alright ill give that a try tomorow
     
  19. Sep 16, 2010 at 5:21 PM
    #19
    gjbonner

    gjbonner Well-Known Member

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    If you look you'll notice that it comes from 2 different parts of the T case and then via a union it comes together in one hose and heads up towards the back of the engine where it rests.
     
  20. Sep 16, 2010 at 5:25 PM
    #20
    shitroc

    shitroc [OP] Master of War

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    ^ok right on, ill have to climb under er tomorow after work and have a better look, there was only enough daylight today left to get the pic i got.
     
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