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Leak diagnosis

Discussion in 'The Garage' started by dremu, Oct 15, 2006.

  1. dremu

    dremu Officious Thread Derailer Premium Member

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    So my K5 is emitting fluid fairly prodigiously.

    The tow rig is also doing so, but it needs a new motor, so that's a simple, if expensive, fix. I do not have the emotional nor financial sitch to do that to both trucks though =))

    The K5, actually, seems to be mostly leaking ATF, though there's also some brown crap down there as well. It drips onto the ground, so I see it on the driveway, but there's ATF (i.e. red) around the cover to the (err, flexplate, right, 'cuz it's a slushbox?)

    So, the question is, how do I figure out what's actually leaking? Soak the whole thing in engine-brite, wash it off, then park over fresh newspaper or something and wait a day?

    I replaced the tranny a while ago, and IIRC the old one leaked just as much ... is there a seal around the shaft that goes into the torque converter, maybe I should go after that? Eww. Pulling a TH350/203/205 is not fun (plus some redheaded idiot has three crossmembers on there =))

    Any input welcome.

    -- A
     
  2. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    For one thing , I would check the pan bolts . I kept thinking my front output was leaking , and looking under there this weekend I notice one bolt just plain GONE , the rest were not too tight . So from now on I have to remember to torque these as well after a filter change and a little driving .
     
  3. dremu

    dremu Officious Thread Derailer Premium Member

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    Checked. Replaced gasket and filter while I was down there. Still bad. (But thanks!)

    Keep 'em coming guys.

    -- A
     
  4. DEMON44

    DEMON44 Low-Tech Redneck

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    there is a seal around your input shaft that the torque converter seals on. very like ly that one.
     
  5. Disciples Performance

    Disciples Performance 1/2 ton status

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    sounds like a pump housing leak to me, common problem depends on how long it has been since it was rebuilt
     
  6. dremu

    dremu Officious Thread Derailer Premium Member

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    Makes sense. Thanks!

    -- A
     
  7. dremu

    dremu Officious Thread Derailer Premium Member

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    What pump? On the tranny? Where on a TH350 would I find one of these? [Is that like "Where on the ox do I find the Oxnard?"]

    -- A
     
  8. Slapperbar

    Slapperbar Retired Navy NDT Examiner Premium Member

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    The torque converter is "plugged" into the front pump on the trans. That's where.
     
  9. dremu

    dremu Officious Thread Derailer Premium Member

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    So is there a seal there, or what do I do to fix it?

    -- A
     
  10. Slapperbar

    Slapperbar Retired Navy NDT Examiner Premium Member

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    I think the pump seal goes betwixt the pump and trans body.
     
  11. DEMON44

    DEMON44 Low-Tech Redneck

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    The pump body is the perfectly round iron thing, the input seal is the little round blue seal near the input shaft. this is a 400 I have in the garage, but a 350 isn't really any different




    [​IMG]
     
  12. dremu

    dremu Officious Thread Derailer Premium Member

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    Sweet. A pic IS worth a thousand words.

    I think droping the tranny and replacing the input and pump seals is in order. Anything else I should look at whilst I'm there -- I hate to drop that mess twice (Doubler, aargh HEAVY!)

    -- A
     
  13. 1979jimmy350

    1979jimmy350 1/2 ton status

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    you do not have to drop the tranny all the way to do this, if you really don't want to drop the tranny replace the belhousing bolts with some long bolts and slid the whole thing back, all you have to do is get enough clearence to remove the torque converter and replace the seal then, its also a good time to replace the rear main seal of the engine if needed, but first make sure that it is that seal, the kick down cable seal and the dipstick seal also can leak and they are both in the front of the tranny
     
  14. dremu

    dremu Officious Thread Derailer Premium Member

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    Problem with the Doubler is that I gotta sorta drop it to sneak it back as it's TIGHT in there ... I'm trying to avoid a body lift 'cuz I'm lazy.

    ::shrug::

    JMS, good call on the starch powder. Thanks!

    -- A
     
  15. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Do you mean GINGER?
    :haha: :haha: :haha: :haha: :pimp: :rotfl: :rotfl: :rotfl: :rotfl: :haha: :haha:
     
  16. dremu

    dremu Officious Thread Derailer Premium Member

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    Eh? As in Maryann?

    In any event, I was referring to the author of the post and the owner of the truck, i.e. me.

    -- A
     
  17. Disciples Performance

    Disciples Performance 1/2 ton status

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    that pump housing is fairly easy to fix just like you said its a pain in the butt for ur doubler to be dropped down but it has to be done my friend only way UNLESS u really wanna pull the engine to get at it haha
     
  18. dremu

    dremu Officious Thread Derailer Premium Member

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    Bah. Don't remind me -- I gotta pull the 454 outta my OTHER truck ... but it's 2WD, so that's something...

    -- A
     
  19. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Its ok...


    I'm a GINGER too. :D
     

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