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Thread: 94 540i 5hp30 no forward

  1. #11

    Default

    Update:
    All, thank you so much for you help and ideas.
    I built the obd1 diag interface [ Thanks genphreak ] and I am working on getting the software to mesh. (I love this stuff)
    I am confident that the valve body is 100% but will check line pressure soon.
    I did not see anything problems or issues with the TCM, Thank god this is pre lead free!

    genphreak,

    1. Car is level, and followed proper procedure for fill. Check it a few times since and fluid level seems happy / consistent.
    2. I used Fuchs Titan 3353.
    3. Prior to the rebuild /repair, trans switch was not functional. Since clean out / repair switch works 100% and feel confident with the switch.

    Once I check line pressure and pull codes (depending on the results from reading codes) and if things point to clutch slipping, I am ready to pull the trans out and rebuild it. I will take photos and create a 'how to' and post on this site as well. (As I learn - I share my knowledge freely)

    Also, once I have the interface and software 100%, I will post an ISO image for others to utilize.

    Thank you all again and will keep you updated.

  2. #12
    Join Date
    May 2005
    Location
    central coast nsw au
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    1,221

    Default

    whiskeychaser, its funny I feel completely comfortable with engines, built a few before, love puling them apart etc but trannys just freak me out

  3. #13
    Join Date
    Feb 2006
    Location
    Oldham, England
    Posts
    3,078

    Default

    Quote Originally Posted by mattyb View Post
    whiskeychaser, its funny I feel completely comfortable with engines, built a few before, love puling them apart etc but trannys just freak me out
    I think most people feel the same way. If you have an auto box fail, you can do this:
    http://www.youtube.com/watch?v=mv0onXhyLlE&feature=kp
    Or you can find out what went wrong and fix it :-)
    Oct '00 E46 330i. Feb '92 525i (departed)

  4. #14
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
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    Default

    Transmissions are just big gray mystery boxes. Have a lot of room to spread everything out in order on a clean surface. Don't flip things over, just like if you scoop them up and pour them back in. Replace seals and frictions same way, don't disturb the order or flip things.

    Clutches should be soaked in the proper fluid for a bit and then assembled. Do not rebuild with dry clutches in an auto trans!
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  5. #15
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
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    Default

    Almost sounds like a selenoid was fubar and burned up clutches. Make sure those are good, replacing disks are for the most part kinda easy. MAKE SURE SELENOIDS are OK first!
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  6. #16
    Join Date
    Dec 2004
    Location
    Sydney, Australia
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    Default

    x2 on that!

    Solenoids are common failures and the TCM can isolate them as a symptom/issue- but not always!

    BTW, re the Fuchs 3353 fluid; it may be ok if your trans is a black-tag version, not green.

    If black, you may want to try a BMW OE fluid such as:

    BMW 83 22 9 407 765
    BMW 83 22 9 407 807

    ... or the Castrol stuff version. This may be the same as the OE fluid.

    (I use Castrol (Transmax Z, a green synthetic fluid) in all my black tag transmissions with great results/improved function)

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

  7. #17
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    Dec 2004
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    Default

    No worries, that's why we're here!

    Very interested to see how you go with pulling the codes and any images you work-up. Good luck!

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

  8. #18
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    Dec 2004
    Location
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    Default CANBus is all the rage now

    Applicable more to >e38 and e39 5 and 7ers: there is a lot of CANbus hacking going on as the auto companies have not bothered to secure Controlled Area Networking in any way other than through their normal levels of apathy and by planning obsolescence. As such, obscurity is the only thing that keeps customer cars locked. Note sites like http://e46canbus.blogspot.com.au/ popping up all over


    Join the Aussie
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    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

  9. #19
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    Dec 2004
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    Default ... but CANbus is a good reason to keep your e31, e32, e34 or e36/avoid later models!

    Long discussion on CANbus hacking:

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

  10. #20
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    May 2005
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    central coast nsw au
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    Default

    oh man what this CANbus?

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