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    Author Topic: A904 Common leak spots  (Read 4717 times)

    Offline 74 challenge

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    A904 Common leak spots
    « on: June 02, 2014 - 11:47:43 AM »
    My A904 leaks and i am having a hard time narrowing it down to one spot. The trans is soaked. I Have changed the trans pan gasket and trans pan and that helped but the thing is still soaking wet. What are some normal areas for these trans to leak so I can try and save my brand new garage floor from looking like my transmission threw up everywhere.
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    Offline crash340

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    Re: A904 Common leak spots
    « Reply #1 on: June 02, 2014 - 11:53:13 AM »
     :popcorn:
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    Greg

    73 Cuda
    Brisbane, Australia

    Offline edl94

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    Re: A904 Common leak spots
    « Reply #2 on: June 02, 2014 - 01:35:12 PM »
    Try the dipstick tube o-ring common spot
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    Offline burdar

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    Re: A904 Common leak spots
    « Reply #3 on: June 02, 2014 - 01:43:50 PM »
    Trans pan gasket
    oil dipstick tube o-ring
    shift lever shaft seal(where valve body goes up through the case)
    snap ring access cover gasket on tailshaft
    tailshaft to case gasket
    tailshaft seal
    speedometer gear housing o-ring
    « Last Edit: June 02, 2014 - 01:46:22 PM by burdar »
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    Offline 74 challenge

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    Re: A904 Common leak spots
    « Reply #4 on: June 02, 2014 - 09:11:20 PM »
    Quote from: burdar on June 02, 2014 - 01:43:50 PM
    Trans pan gasket
    oil dipstick tube o-ring
    shift lever shaft seal(where valve body goes up through the case)
    snap ring access cover gasket on tailshaft
    tailshaft to case gasket
    tailshaft seal
    speedometer gear housing o-ring

    Perfect this is exactly what I was looking for.
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    Offline Jesus H Chrysler

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    Re: A904 Common leak spots
    « Reply #5 on: June 04, 2014 - 09:05:48 AM »
    Almost every auto I've worked on had a leaking shift shaft seal.  Pans leak quite often from people overtightening them and warping the edge.  Those are the first two I'd check.  Spray the case down with brake cleaner and wipe it clean.  Go for a quick drive and look again.  Where it's freshly wet should give you an indication where it's leaking.
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    Yes I own a 1972 Dodge Challenger Convertible T/A S/E with a 440 Six Pak. Can it get any more wrong?

    {OO /===\ OO}
    (OO==> <==OO)



    Greg, in the middle of MA has:
    1970 Dodge Coronet 440 "Zom Bee"
    1972 Dodge Challenger convertible 440 5 speed.
    1973 Dodge Challenger 318 "Brown Bomber"
    2012 Dodge Challenger R/T Classic Blackberry Pearl.
    2001 Jeep Wrangler locked, lifted and lighted.  "Jeep is a registered trademark of Chrysler Corporation"

    Offline 74 challenge

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    Re: A904 Common leak spots
    « Reply #6 on: June 04, 2014 - 09:27:20 AM »
    Quote from: Jesus H Chrysler on June 04, 2014 - 09:05:48 AM
    Almost every auto I've worked on had a leaking shift shaft seal.  Pans leak quite often from people overtightening them and warping the edge.  Those are the first two I'd check.  Spray the case down with brake cleaner and wipe it clean.  Go for a quick drive and look again.  Where it's freshly wet should give you an indication where it's leaking.

    is this shaft seal hard to replace with the trans in the car?

    I do clean the thing off but i'm still having a hard time figuring it out.
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    Offline burdar

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    Re: A904 Common leak spots
    « Reply #7 on: June 04, 2014 - 10:32:21 AM »
    You just have to drop the valve body.  You can then punch out the seal.  Piece of cake.

    I wonder if a parts store would have a cheap dye that you could add to the trans fluid.  That would help.
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    Offline 74 challenge

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    Re: A904 Common leak spots
    « Reply #8 on: June 04, 2014 - 11:59:17 AM »
    Quote from: burdar on June 04, 2014 - 10:32:21 AM
    You just have to drop the valve body.  You can then punch out the seal.  Piece of cake.

    I wonder if a parts store would have a cheap dye that you could add to the trans fluid.  That would help.

    I am a bit weary of working on transmissions since i have absolutely zero experience. Is it just as easy as removing the transmission pan, filter and valve body? I assume I would have to remove the shift levers too.
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    Offline burdar

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    Re: A904 Common leak spots
    « Reply #9 on: June 04, 2014 - 12:21:00 PM »
    It's very easy.  The worst part of the job is taking the pan down without drenching yourself in trans fluid.  Once the pan is off, you can loosen the pinch bolts on the kickdown pivot and shifter pivot levers and slide them off the valve body.  Then remove the filter and all the valve body bolts.  The valve body will come right out.  Just pull and the parking rod will come out of the tailshaft.
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    Offline Jesus H Chrysler

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    Re: A904 Common leak spots
    « Reply #10 on: June 04, 2014 - 05:51:37 PM »
     :iagree: Just make sure to put it somewhere CLEAN.  there are lots of little passages in the valve body and you don't want to pick up something that will make your problems worse.
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    Yes I own a 1972 Dodge Challenger Convertible T/A S/E with a 440 Six Pak. Can it get any more wrong?

    {OO /===\ OO}
    (OO==> <==OO)



    Greg, in the middle of MA has:
    1970 Dodge Coronet 440 "Zom Bee"
    1972 Dodge Challenger convertible 440 5 speed.
    1973 Dodge Challenger 318 "Brown Bomber"
    2012 Dodge Challenger R/T Classic Blackberry Pearl.
    2001 Jeep Wrangler locked, lifted and lighted.  "Jeep is a registered trademark of Chrysler Corporation"

    Offline Katfish

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    • 70 Challenger
    Re: A904 Common leak spots
    « Reply #11 on: June 04, 2014 - 07:03:03 PM »
    You can replace the deal without dropping the pan. I did and it's not that hard
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    Offline 74 challenge

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    Re: A904 Common leak spots
    « Reply #12 on: June 05, 2014 - 08:11:46 AM »
    Quote from: Katfish on June 04, 2014 - 07:03:03 PM
    You can replace the deal without dropping the pan. I did and it's not that hard

    could you quickly go over how you did it?
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    Offline Katfish

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    • 70 Challenger
    Re: A904 Common leak spots
    « Reply #13 on: June 05, 2014 - 08:15:39 PM »
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    Offline 74 challenge

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    Re: A904 Common leak spots
    « Reply #14 on: June 10, 2014 - 09:11:22 AM »
    Quote from: Katfish on June 05, 2014 - 08:15:39 PM
    Read the whole thread, don't even need to buy the special tool.

    http://board.moparts.org/ubbthreads/showflat.php?Cat=0&Board=QuestionAnswer&Number=4653351&fpart=1&PHPSESSID=


    I Read the whole thing..there seems to be no information at all...did I miss something? The attachement is just a picture of the tool.
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