• 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. benzy89's Avatar
        benzy89 -
        Time to give Shep Trans a call -- They build the Alpha 12 GTR trans, so they'll prob be able to figure out the M3 DCT clutch pack since your motor build is done
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Time to give Shep Trans a call -- They build the Alpha 12 GTR trans, so they'll prob be able to figure out the M3 DCT clutch pack since your motor build is done
        Sounds like a good suggestion to me. Beyond disappointed with SSP.
      1. singletrack's Avatar
        singletrack -
        Damn.

        SSP? SSP?

        Bueller? Bueller?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by singletrack Click here to enlarge
        Damn.

        SSP? SSP?

        Bueller? Bueller?
        They don't give a damn. It was a mistake giving them my trans but they were the only ones willing to tackle it at the time.

        Hopefully now that the GTR has matured some of the big guys will want a challenge in other dual clutches with all the experience they now have.

        Really think I deserve better but it is what it is. SSP essentially is making themselves look bad.
      1. LostMarine's Avatar
        LostMarine -
        welp.. looks like im staying sub 600hp for a little while longer..
      1. singletrack's Avatar
        singletrack -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        They don't give a damn. It was a mistake giving them my trans but they were the only ones willing to tackle it at the time.

        Hopefully now that the GTR has matured some of the big guys will want a challenge in other dual clutches with all the experience they now have.

        Really think I deserve better but it is what it is. SSP essentially is making themselves look bad.
        Concur.

        Added to the list of vendors I will never do business with...unless they make this right.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        welp.. looks like im staying sub 600hp for a little while longer..
        You can go big with the stock clutches even man the problem isn't that it's how SSP put this together. Their stuff just doesn't work mechanically.

        They even got their oil pan wrong.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by singletrack Click here to enlarge
        Added to the list of vendors I will never do business with...unless they make this right.
        They won't. I really think I should just post my entire experience.
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Sounds like a good suggestion to me. Beyond disappointed with SSP.
        Only problem, Shep Trans is in OH. Then again SSP is in TX, so neither are in CA

        **Shep Trans also builds the Switzer Ultimate Street Edition GTR Trans. Dodson Transmission is another trans specialist worth reaching out to.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Only problem, Shep Trans is in OH. Then again SSP is in TX, so neither are in CA

        **Shep Trans also builds the Switzer Ultimate Street Edition GTR Trans. Dodson Transmission is another trans specialist worth reaching out to.
        I'll contact both after I hear from Alex. Last he told me he just wants to put the stock clutches in.
      1. LostMarine's Avatar
        LostMarine -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You can go big with the stock clutches even man the problem isn't that it's how SSP put this together. Their stuff just doesn't work mechanically.

        They even got their oil pan wrong.
        if building the motor, im gonna want big power, and a dct to handle it. swapping clutches every few k miles is not viable option
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        if building the motor, im gonna want big power, and a dct to handle it. swapping clutches every few k miles is not viable option
        That's really not would be necessary. My clutches held fine until I used them up. Will they wear faster? Sure, but not every few k miles.
      1. ZooyorQ's Avatar
        ZooyorQ -
        Bummer. I know the DCT is certainly holding a lot of people back from moving forward on this platform. Hopefully someone will step up and start building parts for the tranny. Especially being DCT is the future of most modern sports cars (as much as I hate it personally).
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by ZooyorQ Click here to enlarge
        Bummer. I know the DCT is certainly holding a lot of people back from moving forward on this platform. Hopefully someone will step up and start building parts for the tranny. Especially being DCT is the future of most modern sports cars (as much as I hate it personally).
        There's just not as much demand for an upgraded DCT yet, look at the GTR -- Another DCT, but because it was a HUGE HP platform, there was a ton of demand for a legitimate DCT upgrade. Most M3 owners are content with their stock motor kits, which the OEM DCT is completely capable of handling. So until there's a significant shift in demand (enough to make R&D worth investing in), don't expect any rapid development.
      1. hifiguy@gaphix's Avatar
        hifiguy@gaphix -
        A year and a half is certainly a lot of downtime. However, having gone through my share of setbacks, think of it this way...your list of possible solutions just decreased by one. Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by hifiguy Click here to enlarge
        A year and a half is certainly a lot of downtime. However, having gone through my share of setbacks, think of it this way...your list of possible solutions just decreased by one. Click here to enlarge
        I'm not too stressed it will get resolved. I'm more upset with how SSP conducted business with me and how I'm being treated after volunteering my trans and time for them. I didn't see any other M3 owners giving them their transmission.
      1. ZooyorQ's Avatar
        ZooyorQ -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        There's just not as much demand for an upgraded DCT yet, look at the GTR -- Another DCT, but because it was a HUGE HP platform, there was a ton of demand for a legitimate DCT upgrade. Most M3 owners are content with their stock motor kits, which the OEM DCT is completely capable of handling. So until there's a significant shift in demand (enough to make R&D worth investing in), don't expect any rapid development.
        I think in the beginning with the trans issues it held many back, and I'm sure its still holding people back from pushing the envelope. Its a bit of a cart/horse. Someone needs to step up and take the risk, I'm sure as an owner someone has said I'll front the development costs if we can share the profits.. or i'd hope someone's tried that approach. Moves the risk from the trans builder to the owner.. but both have an opportunity to make a dime. Hopefully someone steps up. I'm sure Dodson/Shep could do it.
      1. hifiguy@gaphix's Avatar
        hifiguy@gaphix -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I'm not too stressed it will get resolved. I'm more upset with how SSP conducted business with me and how I'm being treated after volunteering my trans and time for them. I didn't see any other M3 owners giving them their transmission.
        True that, especially when developing a new product. Time to elevate the issue up through their management.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by hifiguy Click here to enlarge
        Time to elevate the issue up through their management.
        Considering that e-mail is from the owner I don't think I can go up any further.
      1. LZH's Avatar
        LZH -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Considering that e-mail is from the owner I don't think I can go up any further.
        I hear Andy from MHP is making some great progress with the DCT in the SLS maybe he can help you out LOLClick here to enlarge