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Thread: Squirting TH400

  1. #1
    Join Date
    May 2003
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    Default Squirting TH400

    After I checked the ATF level I, by mistake, had the dip stick not suited well into the tube. After a few miles smoke was coming out from underneath the hood: ATF had been squirting out of the tube onto the exhaust and even it reached the inner fender.

    Cleaned it and had the dip stick back in (a heater hose was the cause the stick wasn't in place correctly).

    Does the dipstick avoid ATF squirting out of the tube that far when ATF level is normal? I mean: could there be something wrong with the transmission?
    Rob

    ROA/BCA/BPG

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  2. #2
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    Default Re: Squirting TH400

    I am 99% sure that is normal. As long as the dipstick is not being pushed up by the fluid then you should be fine.
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  3. #3
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    Default Re: Squirting TH400

    OK,

    never expected there was that much pressure in the carter that ATF could squirt out of the tube / and that the dip stick is the only barrier preventing it.

    Thanks.
    Rob

    ROA/BCA/BPG

    68 Wildcat Custom 2dr
    69 Electra 225 Custom 4dr
    71 Electra Custom 2 dr
    72 Estate Wagon
    73 Riviera
    75 Riviera GS

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  4. #4
    Join Date
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    Michigan, USA
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    Default Re: Squirting TH400

    I've never had issues with fluid loss if a dipstick isn't inserted fully. I think you may have a partially or fully clogged transmission case vent tube.

    The small steel tube pointed out by the arrow may be the culprit. Try cleaning it out with a piece of wire or pipe cleaner.



    Devon
    Fuel & Brake Systems Engineer
    "I can live with doubt and uncertainty and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong." - Feynman
    "Good data is precious. The problem I have is when some damned fool fails to use it properly." - Slingerland

  5. #5
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    Default Re: Squirting TH400

    Thanks Devon. Will take a look at it.
    Couldn't imagine that that much pressure would built up in the pan.
    Curious what could have caused the vent tube to be (partially) clocked.
    Rob

    ROA/BCA/BPG

    68 Wildcat Custom 2dr
    69 Electra 225 Custom 4dr
    71 Electra Custom 2 dr
    72 Estate Wagon
    73 Riviera
    75 Riviera GS

    My garage

  6. #6
    Join Date
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    Greensboro, nc
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    Default Re: Squirting TH400

    Quote Originally Posted by 75Riv View Post
    Curious what could have caused the vent tube to be (partially) clocked.
    Insects.. Spiders, wasps, who knows they all like to build in little tubes or holes..
    Jay Davenport
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  7. #7
    Join Date
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    Default Re: Squirting TH400

    Quote Originally Posted by jay3000 View Post
    Insects.. Spiders, wasps, who knows they all like to build in little tubes or holes..
    Wasps got me one time causing this problem, now that you mention it.

    Devon
    Fuel & Brake Systems Engineer
    "I can live with doubt and uncertainty and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong." - Feynman
    "Good data is precious. The problem I have is when some damned fool fails to use it properly." - Slingerland

  8. #8
    Join Date
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    Default Re: Squirting TH400

    Yep, Mud Dobbers! I had that happen on the second trans in the Lark and the tube was clogged with dirt from a mud dobber. PITA to get anything up in there to clen it out. ended up cutting a hole in the trans tunnel and removing the tube , cleaned and reinstalled then brazed the sheet metal back in. Since it was a track car it didnt matter to me.
    ROA Member # 13359
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