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    • DCT Build Part XII - Build complete, pictures of final assembly, transmission cooler, and Viton seals

      Well, this has been a rather lengthy road to completion but the transmission is basically complete. The car was dropped off by SSP last month to Gintani who should have the motor in by the end of this week. The problem is SSP mounted their trans cooler in the location the heat exchanger for the supercharger needs to go so SSP will need to come to Gintani's facility to re-run their lines as the cooler will need to go in a different location. What took so long for this update? Well, we have been waiting, and waiting, and waiting for SSP to send us details on the Viton seals that required 3 redesigns but never received the information on why these seals are superior to the stock units.

      So, I decided to do my own research and here is what I came up with. These are the stock BMW seals used in the DCT. What is wrong with them exactly? We do not know other than they apparently are not up to the task:










      Here are the Viton seals which delayed the project by 3 months. Viton is a synthetic rubber used for seals, O-rings, things of that sort. Viton was likely used as it is less susceptible to decay and already used in BMW applications such as in VANOS. Viton has much higher temperature and chemical resistance characteristics than the stock seals. Here is what they look like:










      This is the DCT cooler that was mounted by SSP up front. This needs to be moved somewhere else as the supercharger heat exchanger will need to go there. This means SSP will need to come out and run their lines again checking all their fluids and so forth before tuning can take place:














      This is the final assembly. So, the transmission is built but it took about a year longer than estimated. I believe I was as patient as possible and hopefully this will all be wrapped up in December with a built motor, built transmission, a YSI, and a ton of horsepower.






































      This article was originally published in forum thread: M3 DCT Build Journal - World's First BMW DCT Build started by Sticky View original post
      Comments 2372 Comments
      1. c32AMG-DTM's Avatar
        c32AMG-DTM -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You need to understand that there are three people all basically doing the Stage III's at the same time. So basically three setups got rebuilt. Mine never even got to start I don't think before having to be rebuilt although they put the motor back in and everything but there was no point.

        The motor was paid for back when I sold my original kit. Then after that I paid for the YSI, new manifold, new exhaust, new meth system, cage, racing seats, gauges, labor, and all kinds of other stuff. I don't even know how this all keeps adding up but it does the longer the car sits there. Next thing will be a new trans, lines, etc.

        Did Gintani take longer than expected? Yep, way longer. But at least they are getting it right.
        Thank you - and yes it's commendable that they (Gintani) are seeing this through to the end, regardless of the duration.

        I just wonder if the motor-side of things had been ready once SSP first finished the trans, if SSP might have been more receptive to helping out if any issues were encountered. I know from your comments there were of course valid reasons why the rebuilt trans sat around for a year and a half uninstalled/not running, but I can also see why that might make the trans builder reluctant to do anything if/when something goes wrong.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by c32AMG-DTM Click here to enlarge
        I just wonder if the motor-side of things had been ready once SSP first finished the trans, if SSP might have been more receptive to helping out if any issues were encountered
        It was finished. Nobody knew another motor build would take place at that time. We ended up waiting on SSP for over a year doing nothing with the motor really until later the sleeve design was figured out by one of the other guys.

        Click here to enlarge Originally Posted by c32AMG-DTM Click here to enlarge
        but I can also see why that might make the trans builder reluctant to do anything if/when something goes wrong.
        Why? If the trans is done what is the problem? We plugged in an OEM trans that had been sitting around and it works fine so I don't see the issue.
      1. PEI330Ci's Avatar
        PEI330Ci -
        This is just a presumption, but from my experience with other control units, there is usually a maximum allowable error for certain parameters.

        I wonder if the total clutch package thickness might be an issue, as the "teach in" values would read different from OEM then. If you had access to them, it would be easy to stack and measure outside of the transmission....
      1. NikB316's Avatar
        NikB316 -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge



        BTW -- The C32 AMG is an embarrassment to AMG cars, especially when you consider the M113 5.4L supercharged V8 was out at the same time.

        LOL the C32 was one of the biggest POS put out not only by AMG but Benz as a whole. I used to rag on that car all the time. Good memories. I give that poster credit for publically admitting to owning one.
      1. Sticky's Avatar
        Sticky -
        This isn't about the C32 guys who cares.
      1. Commanderwiggin's Avatar
        Commanderwiggin -
        Updates?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Commanderwiggin Click here to enlarge
        Updates?
        This make me laugh.
      1. Commanderwiggin's Avatar
        Commanderwiggin -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        This make me laugh.
        Expected from this build I suppose.
      1. bobS's Avatar
        bobS -
        updates?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bobS Click here to enlarge
        updates?
        Updates were posted in another thread.
      1. bdtsulev's Avatar
        bdtsulev -
        Is there going to a motor build thread with pics and what not at some point?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bdtsulev Click here to enlarge
        Is there going to a motor build thread with pics and what not at some point?
        No the motor build happened a while ago.