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ATF consumption????

Discussion in 'The Garage' started by tomseviltwin, Feb 14, 2005.

  1. tomseviltwin

    tomseviltwin 1/2 ton status

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    ATF consumption. My th400 is consuming alot of tranny fluid but there is nothing apparently really dripping off the belly of my 87 Suburban. It has gone through 3 quarts in the last couple weeks. Today I noticed some grey smoke from the exhaust that smells like cooking ATF. Is it possible that I'm vacuming ATF through the vacume connection thing on the side of the transmission, and if so, would it be fixable by replacing that part? :confused::confused:
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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    have you checked the level in your transfer case it might be leaking into the transfer case which would leave no signs on the under side
     
  3. tomseviltwin

    tomseviltwin 1/2 ton status

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    No, but I will
     
  4. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    BINGO! Pull the vacuum hose off of the modulator (thing on the tranny) and see if the hose has fluid in it (it should not). Easy fix. :thumb:
     
  5. mxfireman

    mxfireman 1/2 ton status

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    mine never seemed to drip when it was sitting when I drove it, it then would drip onto the exhaust and get baked off. Couldn't really find where it was coming from so I replaced the tranny pan gasket and have had no more problems.
     
  6. tomseviltwin

    tomseviltwin 1/2 ton status

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    I just ordered a new modulator. The smoke and the 6 quarts of atf lead me that way. $22 at checker. Autozone said it's unavailable:dunno:
     
  7. sweetk30

    sweetk30 professional hooker Premium Member

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    local tranny shop will have on shelf. if needed asap
     
  8. tomseviltwin

    tomseviltwin 1/2 ton status

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    Yeah the vacume line was full of atf when I pulled it off. I replaced the modulater and it's working fine now. Now my other burb is giving me trouble:(
     

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