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M-Series (M1, M3, M5, M6) General M-Series Discussion - If it does not fit into a more specific M Category above, please place it in here. In addition, previously archived M-Series discussion is located in this section.

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Old 08-26-2009, 11:45 AM   #1 (permalink)
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Smg?

I'm confused on how the tranny works in these. I don't really understand how they work and what you do. Do you always manuely change the gears or is it like most autos these days with tiptronic?
I might consider one so the girlfriend can drive it with out worrying about stalling.
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Old 08-26-2009, 07:14 PM   #2 (permalink)
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It can be set to act like an automatic.

Here is more stuff for yoru delight: HowStuffWorks "How Sequential Gearboxes Work"
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Old 08-27-2009, 05:56 AM   #3 (permalink)
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or you can teach her stick!! jk lol, not gonna be one of those assholes

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Old 08-27-2009, 08:42 AM   #4 (permalink)
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Some, if not most, are shifted by "flappy paddles" (quote borrowed from Top Gear) on the the steering wheel. In any case, the dual clutch set up is heavier than a fully manual gear box, though not quite so much as a fully auto box.
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Old 08-27-2009, 11:11 AM   #5 (permalink)
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She knows how to drive stick just not really good at it, shes still somewhat nervous about it. Its heavier than a regular auto? Chances are Ill get a stick for sure, but was considering the benefits of having the smg.
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Old 08-27-2009, 11:34 AM   #6 (permalink)
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They're a bit heavier than a regular manual, but a bit lighter than a fully auto.
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Old 08-31-2009, 04:26 PM   #7 (permalink)
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Some, if not most, are shifted by "flappy paddles" (quote borrowed from Top Gear) on the the steering wheel. In any case, the dual clutch set up is heavier than a fully manual gear box, though not quite so much as a fully auto box.
SMG uses a dual clutch setup?? i know the e90 does, but does the e46 also?? because i donno if i missed it but was the car looking mentioned??
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Old 09-01-2009, 08:28 AM   #8 (permalink)
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My Understanding is that the SMG trans that BMW offers (e46 and earlier) were always clunky when in auto mode. I don't know what the setups are on the newer cars though. Just teach the GF how to drive a stick and make her practice.
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Old 09-01-2009, 08:50 AM   #9 (permalink)
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AFAIK, they are not necessarily dual clutch type. If you Google sequential manual gearbox, you'll find more info.
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Old 09-01-2009, 12:35 PM   #10 (permalink)
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E46 M3 SMG uses the same s6s 420g transmission as the standard m3. Same clutch/flywheel too. It just has a computer and a hydraulic system to do the shifting and clutching for you.

I was damn tempted to try to use the SMG shifting mechanism and computers in my 6 speed swap on my car. Just too much custom electronics, too much down time for my liking - and thats SMG's true flaw.. a lot more parts to fail vs a std transmission depending on if you are buying used, and how long you keep cars.
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