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      04-09-2007, 05:00 AM   #1
Steved
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M-DCT

Over on another forum someone was asking about the origins of BMW's new M-DCT transmission and I thought it might be worth sharing my response just in case a similar question is asked here on M3Post.

Internal BMW correspondence confirms that the M-DCT box will only be available from March 2008. I seem to remember that there was a news leak on Ricardo Engineering's website just over a year ago, talking about a collaboration with BMW on a new gearbox. However there was also news that BMW had bought the DCT technology from Borg Warner. And finally just to confuse us, there is equally strong information to conclude that M-DCT is a Gertrag based system.

www.just-auto.com/article.aspx?ID=88902&lk=fs

Article said:
Quote:
With Volkswagen having stolen a march on its competitors, the question now is who will be next? Well, according to CSM's intelligence, it will be a race between Ford Europe and BMW, with announcements expected before the end of 2006: Getrag-Ford has been developing two DCTs called the MPS6 (or DCT450), for use with L4 and V6 engines, and a shorter SPS6 (or DCT470) for use with the longer L5 (Volvo) engines. Meanwhile, Getrag has been developing a DCT called the 436 (or 7DCI600), which is to be supplied exclusively to BMW. The first application will be the BMW M3, which is powered by a new 307kW/412hp 'S65B40' gasoline engine. Thereafter, expect to see it in various BMW 3-Series and 5-Series cars. Following them will be a Getrag 481 (or 7DCL650) unit for Ferrari, and the much delayed ZF unit in the Porsche 911

What is not clear is perhaps if they may end up using several systems (i.e. Borg Warner system in mainstream BMWs, and Gertrag DCT system in M-models) just as they did with SMG (i.e. SSG was used in the 3-series, whilst SMG was unique to M-models).

Interestingly, Ricardo performed a benchmarking study of the SMGIII transmission back in 2005
http://www.ricardo.com/download/pdf/...ns_bmw_001.pdf
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      04-11-2007, 09:05 AM   #2
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If this M-DCT is not due out until March 08, do you think the production cars coming to the US will have that option? I'm guessing since US arrivals are expected around March 08. I'd hate to get my manual and then only a month or two later this option be available.
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      04-11-2007, 09:11 AM   #3
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DCT has been confirmed in the UK option list press release for March 08.
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      04-11-2007, 09:46 AM   #4
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Well, I know I'm in the first allocation at my dealer here in Houston. If M-DCT is not an option at that time then I'll wait untill the 2nd or 3rd allocation.
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      04-11-2007, 10:47 AM   #5
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Originally Posted by gasman View Post
Well, I know I'm in the first allocation at my dealer here in Houston. If M-DCT is not an option at that time then I'll wait untill the 2nd or 3rd allocation.
I was thinking the same, but wondering about how wise it is to jump on a brand new transmission. Anyone know if Audi had any teething problems with theirs when they brought it out?
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      04-11-2007, 11:14 AM   #6
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I would hope that the kinks would have already been worked out. Would BMW put an unrefined tranny on the market? Hope not!
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      04-11-2007, 12:16 PM   #7
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Quote:
Originally Posted by gasman View Post
I would hope that the kinks would have already been worked out. Would BMW put an unrefined tranny on the market? Hope not!



I have read post after post on m5board about all the issues with the SMG failures. Might have been a few kinks not worked out on the M5 and M6 SMG III .

And know what? I would still buy a used M5 with SMG for that moment when the shift slams your head into the headrest!
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      04-11-2007, 01:22 PM   #8
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Originally Posted by brandonlowe View Post



And know what? I would still buy a used M5 with SMG for that moment when the shift slams your head into the headrest!
Amen!! I just hope the M-DCT is an available option from the get go here in the US!
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      04-11-2007, 04:53 PM   #9
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yea gas man

good idea spider monkey. suck it up and get the first allocation so u can be a and get plenty of that way i can borrow it for the weekend.
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      04-11-2007, 08:28 PM   #10
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good idea spider monkey. suck it up and get the first allocation so u can be a and get plenty of that way i can borrow it for the weekend.
:rocks: Damn straight....zzzdoc -------->
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      04-11-2007, 08:34 PM   #11
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Quote:
Originally Posted by Stankia View Post
So is it better than DSG?
DSG is the double clutch gearbox used by Audi and Volkswagen. I assume BMW's M-DCT is going to be very similiar if not the same. Really have no idea how it will perform. Can't wait to find out!
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      04-12-2007, 04:54 AM   #12
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Check this thread from a year ago:

http://www.m3post.com/forums/showthread.php?t=14369

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      04-15-2007, 01:43 AM   #13
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DCT info direct from Getrag

http://www.getrag.de/455

Only 18 lb heavier than their 7SP Automated Manual (is this the M5 SMG III?).
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      03-16-2008, 02:16 PM   #14
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Sorry if this has been posted before but according to Bimmer Mag May 2008 the M-DCT is definitely made by Getrag, 7DCI600 (letter "I" not number "1")
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