Transfer case leak ... where?

Discussion in 'Mazdaspeed 3/6 Engine' started by jsilva, Apr 2, 2020.

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  1. jsilva

    jsilva Silver Member

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    My Speed6 has been leaking transmission fluid. Today I finally saw for sure where it’s coming from, and it looks like the transfer case. But I don’t understand the internals to know how it could be leaking or what to do about it.

    I wiped up the fluid and droplets formed as in the photo, seeming to come right from the case. It does not appear to be dripping down from above where the droplets are.

    It may or may not be worth mentioning that it was dripping out when the front of the car was lifted up on jack stands.

    383B1EB3-532F-45FB-B7C8-5A207D5751EC.jpeg

    Maybe I should repeat that the fluid which is leaking is transmission fluid. I don’t know too much about the transfer case but it looks like it uses its own fluid. What’s leaking is definitely the gear oil which is added to the transmission.
     
    Last edited: Apr 2, 2020
    jsilva, via an iPhone, Apr 2, 2020
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  2. Raider

    Raider Administraider Administrator Platinum Member

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    Transfer case uses gear oil too. I would make sure it's got fluid before driving again. The leak could be from and internal seal.
     
    Raider, via a mobile device, Apr 3, 2020
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  3. jsilva

    jsilva Silver Member

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    Thanks Raider. I should explain more.

    When I got the car and eventually changed the transmission fluid there was maybe 1.5 quarts in it. When I put in the proper amount it started leaking for a few days (puddles on driveway). Eventually the puddles stopped. At some point I decided to top off the fluid (lost maybe 0.5 quarts) to help diagnose where the leak was coming from and the puddles returned. I thought it was coming from the passenger side axle seal.

    So, just yesterday I was working on the car and noticed a fresh puddle and investigated. That’s when I saw it pooling up on the transfer case. Definitely not the passenger axle seal.

    I just don’t understand (yet) how all of the parts work together and are connected. I had been assuming that the transfer case got its fluid from the transmission, but then I see the drain and fill bolts on the TC.
     
    jsilva, via an iPhone, Apr 3, 2020
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