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transmission fluid leak

This is a discussion on transmission fluid leak within the Technical / Maintenance forums, part of the General Discussion category; i have a fluid leak from my tranny. it isn't the pan gasket(just changed that). Where else could it be ...

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    transmission fluid leak


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    i have a fluid leak from my tranny. it isn't the pan gasket(just changed that). Where else could it be coming from?
    91 silverado- automatic tranny.
    91 chevy silverado
    350 crate engine
    40 flowmaster delta flow

  2. #2
    Get in sit down hang on. SolMan98's Avatar
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    well, where is it leaking from? front, back, side, top?

    could be front or rear seal. dipstick tube. several others.

    D/D-2006 HHR 1LT 5-Speed.
    1996 Silverado, 5.7, FIPKII, Elect Fans, S/S Headers, Duals, Wait4Me, 4/5 drop on 18" Weld Evo Velosity's. STOLEN ON 9/9/2006

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    somewhere near the pan. thats how i got confused.. i thought it was the pan. so i guess you could say near the front of the transmission.
    91 chevy silverado
    350 crate engine
    40 flowmaster delta flow

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    get under ur truck and feal infront of ur tranny above the pan if theres fluid there its prob front seal. i have to change mine, mine leaks realy bad

    I'd rather push a chevy then drive a ford!

    IN STAINLESS WE TRUST!
    IN CHROME WE RUST!

  5. #5
    Home of the Snooki punch! CKTA's Avatar
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    There is also a seal for the shift linkage.
    2014 Carlisle All Truck Nats info..
    http://www.fullsizechevy.com/forum/o...g-1st-3rd.html


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    how do i check the seal for the shift linkage?

    where is that at?
    91 chevy silverado
    350 crate engine
    40 flowmaster delta flow

  7. #7
    Home of the Snooki punch! CKTA's Avatar
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    Originally posted by chevydude
    how do i check the seal for the shift linkage?

    where is that at?
    Drivers side of trans. just above the pan. You'll see the shift linkage goin gin there.
    2014 Carlisle All Truck Nats info..
    http://www.fullsizechevy.com/forum/o...g-1st-3rd.html


  8. #8
    Ill buy that for a dollar Tahoekid's Avatar
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    If you can...Its best to degrease it first and get it nice and clean then run it if its a bad leak or drive it for a while. I like to at least put on 50 miles and look to see where the leak is.

    Chris.
    97 TahoeLS 4X4. Just plain stock.
    1966 Chevelle SS396, real SS w/big block 396, Muncie 4spd, buckets, console. 12 Bolt rear.
    1969 Chevelle SS396, real SS, planned 496, TH2004R, Buckets, Console, 12 bolt.
    If it aint broke, just give me a minute.

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    Mine is also leaking.....i got under and made sure the pan bolts were tight, they werent, midas was sapposed to do all that during my oil change and didnt....so now my work will be done in the driveway.

    Its probly the front seal....if its anything like mine, theres a pan looking thing infront of the fluid pan with a hole in teh bottom center, if the fluid is hangin in around there, most likely the front seal from what ive heard. thats what mine is prolly doin unless the pan bolts was what it was.

    If its the front seal, a tranny place will want 300 or more since they have to drop the tranny If you have access to someone with a tranny jack or know someone that does tranny work, go through them, cost less.

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    i just remembered... the leak has been there a while. My dad and i dropped the tranny and replace the front seal not too long ago, hoping that that would take care of it. But it hasn't. Hopefully that bit of info can help.
    what else would be causing a leak now that the front seal and pan gasket is ruled out?
    thanks
    91 chevy silverado
    350 crate engine
    40 flowmaster delta flow

  11. #11
    Home of the Snooki punch! CKTA's Avatar
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    Is it really trans fluid? Because it could be oil on the inspection cover. If your intake, valve cover or rear main is leaking....it will go down onto/into the inspection cover.
    2014 Carlisle All Truck Nats info..
    http://www.fullsizechevy.com/forum/o...g-1st-3rd.html


  12. #12
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    no. it's tranny fluid. it got low one time and it started slipping a bit. i added fluid and it corrected itself.
    91 chevy silverado
    350 crate engine
    40 flowmaster delta flow

  13. #13
    Home of the Snooki punch! CKTA's Avatar
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    OK then it's the pump seal. Also, if you overfilled it......it will leak out some 'til it gets down.
    2014 Carlisle All Truck Nats info..
    http://www.fullsizechevy.com/forum/o...g-1st-3rd.html


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    is the pump seal the same as front seal and if not where is it at and what does changing it entail?
    91 chevy silverado
    350 crate engine
    40 flowmaster delta flow

  15. #15
    Ill buy that for a dollar Tahoekid's Avatar
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    The pump seal is part of the "front pump" in the front of the transmission. Its kind of like an oil pump in an engine. when the input shaft turns the pump also does and thats what pumps fluid through the transmission.

    Unfortunately, you will have to pull the trans from the engine to change this. Same way you did the rear main. But thats typical isnt it? You go through a bunch of work to fix one thing just fine and then you have to go through it all again to do something else?

    Typical murphys law. I have the same kind of luck too.

    Chris.
    97 TahoeLS 4X4. Just plain stock.
    1966 Chevelle SS396, real SS w/big block 396, Muncie 4spd, buckets, console. 12 Bolt rear.
    1969 Chevelle SS396, real SS, planned 496, TH2004R, Buckets, Console, 12 bolt.
    If it aint broke, just give me a minute.

 

 

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