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    • 2012 C63 AMG facelift models to get MCT 7 speed transmission, does this change the tuning game?

      The major roadblock for the C63 AMG has been the transmission whose software has not been cracked preventing tuners from exceeding the limitations. Well, Mercedes has no decided to replace the 7-speed auto in the C63 with their AMG Speedshift MCT transmission. This transmission is a dual clutch, semi-automatic transmission that is also featured in the CLS63 AMG. It is able to handle the torque produced by the twin turbo V8 so perhaps this means the C63 will have a higher torque capacity than the old 7G-tronic automatic which was limited to 542 pound-feet of torque.

      How does this transmission differ from the old one? Well, it does not have a torque converter. It uses a compact wet clutch setup with multiple clutches hence the name MCT (multi-clutch technology). It is a dual clutch transmission but not a true dual clutch. Confusing, yes, but really it is the automatic we all know with the torque converter replaced by wet clutch packs. This allows faster shifts of about 100 milliseconds.

      This transmission is available already in the SL63 and E63 AMG. It is also used with the new twin turbo V8 motors and is featured in the CLS63 AMG which makes us think it can handle a bit of torque. It is also lighter than the previous automatic transmission weighing in at 80 kilograms.

      There are multiple modes the user can choose to use with the transmission. There are four shifting modes the driver can choose from. There is also a completely manual function which will not up-shift automatically for the driver which is a huge plus and mitigates some of the driver interaction advantage BMW has had for some time. Additionally, a "race start" mode is features which is a fancy way of saying launch control.

      Overall, this is a great development for the C63 as Mercedes continues to improve the model and make it far more of a drivers car. Mercedes continues to raise the bar and we applaud their efforts. What we are left wondering is if tuners will be able to crack the transmission software on this trans and just how much torque it can handle. Time will tell, but this makes things very interesting in the sport sedan segment as it appears Mercedes has surpassed the M3 by continually upgrading the C63 while the M3 has stayed stagnant.




      This article was originally published in forum thread: 2012 C63 AMG facelift models to get MCT 7 speed transmission, does this change the tuning game? started by Sticky View original post
      Comments 48 Comments
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        That is not the same trans destined to be put behind the M157 5.5L TT. It's a revised version of the SL63/E63 MCT that tends to eat more power than a standard 722.9
        What is the difference with the one paired to the M157? It is also an MCT, isn't it?

        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        there have also been "issues" with the MCT that hopefully have been addressed by now
        Such as?

        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        Also the shifting at WOT is far from a SMG or DCT, there is quite a delay still.
        True, but it should be more responsive than an auto.

        So, ultimately, the question is will this trans pose the same problems as the torque converter 7 speed?
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        What is the difference with the one paired to the M157? It is also an MCT, isn't it?
        My WAG is internals, we won't know until it's released and someone has one apart.

        Such as?
        Edited in post above.

        True, but it should be more responsive than an auto.
        Yes, but it's def not a SMG/DCT.

        So, ultimately, the question is wil this trans pose the same problems as the torque converter 7 speed?
        I believe so, MCT is a band aid for the converter, not the trans itself. From what we've seen so far with the SL and 2010 E63 versions I'm not holding my breath.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        the wet clutch MCT can hold more torque than the 722.9 converter but it just passes it along to the next weakest link (trans internals) which led to more tranny failures.
        Interesting, but will upgrading those parts pose a problem with the tranny software?
      1. DarkPhantom's Avatar
        DarkPhantom -
        "It is a dual clutch transmission but not a true dual clutch. Confusing, yes, but really it is the automatic we all know with the torque converter replaced by wet clutch packs. "

        Ok, so it doesn't have a tq converter, BUT it will act like an auto? So...does that mean it will crawl forward when you let off the brake? Maybe...someone I know will get one and I can actually see how it works :O
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DarkPhantom Click here to enlarge
        So...does that mean it will crawl forward when you let off the brake?
        Yes.
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Interesting, but will upgrading those parts pose a problem with the tranny software?
        It's very likely and the software is also going to be different, but no more easily accessible.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        It's very likely and the software is also going to be different, but no more easily accessible.
        Then this changes nothing but perhaps the software will have higher torque limits?
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Then this changes nothing but perhaps the software will have higher torque limits?
        Perhaps but with what happened to earlier MCT I highly doubt it. We shall see.
      1. bogdan_mb's Avatar
        bogdan_mb -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        they needed to catch up. porche has it, bmw has it, even VW with their GTI have dual clutches for the fast shifts one of the first too.

        and theyre smart with the clutch discs, they're making it fail safe pretty much.
        AMG already has the double clutch gearbox (DCT , not MCT) but it seems they are keeping in only for the SLS. I really don't know why since you can get something similiar in a 10.000$ VW POLO
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bogdan_mb Click here to enlarge
        AMG already has the double clutch gearbox (DCT , not MCT) but it seems they are keeping in only for the SLS. I really don't know why since you can get something similiar in a 10.000$ VW POLO
        Doesn't make any sense to me why they would use an MCT over a DCT if they have one.
      1. Fly970TT's Avatar
        Fly970TT -
        I had a C63 after that W212 E63..MCT is garbage. It would slip and jerk..not even close to DCT or PDK.
        IMO the C63 might not be as fast but is a lot smoother. I hated MCT so much i traded in for PTT..lost $20k in 1 year!
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by Fly970TT Click here to enlarge
        I had a C63 after that W212 E63..MCT is garbage. It would slip and jerk..not even close to DCT or PDK.
        IMO the C63 might not be as fast but is a lot smoother. I hated MCT so much i traded in for PTT..lost $20k in 1 year!
        Sir i recomend you to try SMG , if you get used to it all other transmissions seem smooth
      1. Fly970TT's Avatar
        Fly970TT -
        Click here to enlarge Originally Posted by HeroSina Click here to enlarge
        Sir i recomend you to try SMG , if you get used to it all other transmissions seem smooth
        Yes i did..i had an 08 M5..love it at first but not good in LA traffic. SMG by far is the worst!

        Click here to enlarge
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by Fly970TT Click here to enlarge
        Yes i did..i had an 08 M5..love it at first but not good in LA traffic. SMG by far is the worst!

        http://i474.photobucket.com/albums/r...i/IMG_2004.jpg
        Beautiful car
        in high speeds it is not that bad , but in traffic it's really jerky
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by HeroSina Click here to enlarge
        Beautiful car
        in high speeds it is not that bad , but in traffic it's really jerky
        I hear that. Worst auto function ever and w/out L.C. horrible off the line. Gotta love WOT shifts especially after a tune. Still my favorite DD to this day.
      1. bogdan_mb's Avatar
        bogdan_mb -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Doesn't make any sense to me why they would use an MCT over a DCT if they have one.
        Look what I've just found :

        An A22 AMG is also in the pipeline, using a 270bhp unit. The A-Class will become the second Mercedes model to feature a seven-speed DSG gearbox as standard, after the SLS AMG.
        Source : Autoexpress uk, I don't know if they are trust worthy.
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by bogdan_mb Click here to enlarge
        Look what I've just found :

        An A22 AMG is also in the pipeline, using a 270bhp unit. The A-Class will become the second Mercedes model to feature a seven-speed DSG gearbox as standard, after the SLS AMG.

        Source : Autoexpress uk, I don't know if they are trust worthy.
        I don't trust AutoExpress
        If you want to make sure about one thing , go for AutoCar UK ,%99.99 of what they say make it to real world
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        I hear that. Worst auto function ever and w/out L.C. horrible off the line. Gotta love WOT shifts especially after a tune. Still my favorite DD to this day.
        Trying to treat it like an auto is the mistake people make. Treat it like an automated manual and drive it as such and SMG is excellent. The only bad thing about it is auto mode.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bogdan_mb Click here to enlarge
        Look what I've just found :

        An A22 AMG is also in the pipeline, using a 270bhp unit. The A-Class will become the second Mercedes model to feature a seven-speed DSG gearbox as standard, after the SLS AMG.
        Source : Autoexpress uk, I don't know if they are trust worthy.
        Interesting but I just don't understand why they don't give the C63 AMG the SLS DCT.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Fly970TT Click here to enlarge
        I had a C63 after that W212 E63..MCT is garbage. It would slip and jerk..not even close to DCT or PDK.
        IMO the C63 might not be as fast but is a lot smoother. I hated MCT so much i traded in for PTT..lost $20k in 1 year!
        If it doesn't improve the driving experience then why even change to the MCT? They might as well have left it alone.