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Thread: Transmission leak, only while driving

  1. #1
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    Default Transmission leak, only while driving

    just noticed a transmission leak yesterday dead center of transmission,left side. There is a horizontal seal running the length of the transmission, two vertical bolts in the center mark the spot. I got it home, wiped it clean, came out this morning, no leak. Drove it to work and the leak is back. Must be slight enough that it only leaks when I drive it?


    Anyone ever hear of such a thing?
    93 Carry (AC/4wd/HILO/DIFF Lock/Axle Lock,4spd Manual)

  2. #2
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    The tranny fluid would be lower than the seam, so while sitting still it wont leak, but when getting thrown around while spinning it is being splashed up to the seam. Make sure the bolts in the area are all tight. There is no gasket in the seam, only a thin bead of sealant. Sounds like maybe there's a spot that was missed. If you clean it right off with brake cleaner or contact cleaner, and then put a little sealant on the outside it may hold. (let it dry completely before driving again). If not, split the tranny or you could live with a little anti rust action.

  3. #3
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    Quote Originally Posted by packrat View Post
    The tranny fluid would be lower than the seam, so while sitting still it wont leak, but when getting thrown around while spinning it is being splashed up to the seam. Make sure the bolts in the area are all tight. There is no gasket in the seam, only a thin bead of sealant. Sounds like maybe there's a spot that was missed. If you clean it right off with brake cleaner or contact cleaner, and then put a little sealant on the outside it may hold. (let it dry completely before driving again). If not, split the tranny or you could live with a little anti rust action.
    Thanks for the advice. That makes perfect sense. Good to know that there really isnt a gasket there. Would RTV be the apropriate sealer? I had visions of cracking the tranny open all for a little leak, seemed like a pain. Hope the other stuff works for me =)
    93 Carry (AC/4wd/HILO/DIFF Lock/Axle Lock,4spd Manual)

  4. #4
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    I degreased and RTV'ed the place i thought the leak was coming from. Drove it arround, Didnt fix it, then i looked a little harder. Above these two screws (again center of transmission passenger side, kinda hidden behind the starter) and ther is a little shiny hole about 3/8" in diameter. It doesnt look threaded per-say, but has scoring on it like somthing may have been shoved into it. I noticed it before and found it odd that it was so shiny when the rest of the tranny housing was dingy and dirty. I looked at it and it didnt appear to be a "hole" so i ignored it.

    Could something have fallen out if that hole (e.g. why its so shiny)? Did my inspection fail, does that hole truely go into the interior? Could that be where its leaking from?

    Where is the breather element on this transmission?
    93 Carry (AC/4wd/HILO/DIFF Lock/Axle Lock,4spd Manual)

  5. #5
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    is there a breather in the tranny as there is in the diffs?? maybe you could poke a stiff wire in there to see if it does go into the body of the tranny.
    “The man who does not read has no advantage over the man who cannot read.”
    ― Mark Twain

  6. #6
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    I don't know fupa. My guess is that any time you have gears and what not splashing around in oil, u need a breather. Ccv for engine crank, breather for diffs, and so on. I poked at it a bit this morning and its definitely oily in there but l can say for sure is the back end of the hole is solid. It May dog leg down into the innards tho. ill look closer when I get the chance.
    93 Carry (AC/4wd/HILO/DIFF Lock/Axle Lock,4spd Manual)

  7. #7
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    Ya I would assume it's a breather as well....and prob. as you said doesn't come straight out to cut down on oil splashing into the breather hose..
    “The man who does not read has no advantage over the man who cannot read.”
    ― Mark Twain

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    Will this help?
    Attached Images Attached Images
    1992 Suzuki Carry DD51T-152426
    My short-term memory is not as sharp as it used to be.
    Also, my short-term memory is not as sharp as it used to be.

  9. #9
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    Or do you mean this hole where mine has a rubber plug.
    Attached Images Attached Images
    1992 Suzuki Carry DD51T-152426
    My short-term memory is not as sharp as it used to be.
    Also, my short-term memory is not as sharp as it used to be.

  10. #10
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    Quote Originally Posted by Little Foot View Post
    Or do you mean this hole where mine has a rubber plug.
    OMG that helps! Yes!! YES!!! I dont have a plug there. I have a shiny hole!

    i think that hole is belching oil. its hard for me to get my head in there to see it well b/c the starter is in the way. I poked at it with the wire and it has a solid back. But it could have a vertical hole off to the side within the depression (dog leg). I didnt want to just plug it till i knew i wasnt plugging the beather.

    EDIT: My other thought being, make my own breather from that hole.

    This is good news! Thanks Little foot! 2x for the carb vacuum hose ID/OD too.
    Last edited by o8k; 04-08-2010 at 01:54 PM.
    93 Carry (AC/4wd/HILO/DIFF Lock/Axle Lock,4spd Manual)

  11. #11
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    Ok im all plugged up now (will add pic this weekend). This FIXED my leak. thanks again little foot for the picture.
    you can disregard the wasted RVT you see there.... it was a red herring...



    Me being me... and i cant let this go... i had to find the actual breather but i cant. The diagram (SEE POST #8) seems to show it south of the fly wheel hole/cap and a bit driver's side. I have solid metal where a hole could possibly be drilled instead.. hrm...
    Last edited by o8k; 04-10-2010 at 03:47 PM.
    93 Carry (AC/4wd/HILO/DIFF Lock/Axle Lock,4spd Manual)

  12. #12
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    Mine just has an other rubber plug on top leftside of transmission drivers side. about 2 to 3 inches from speedo cable. No vent pipe like the picture in the book shows!
    Last edited by Little Foot; 05-11-2010 at 05:46 AM.
    1992 Suzuki Carry DD51T-152426
    My short-term memory is not as sharp as it used to be.
    Also, my short-term memory is not as sharp as it used to be.

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