speedzer

if someone could enlighten me on this topic. i was watching Best Motoring videos with the M3. in the video, it looked like it was an automatic. shifting for the driver. i just don't get this technology. and if its soo advance, why aren't other Manufactures implement this type of tranny?

Dan Martin

http://auto.howstuffworks.com/sequential-gearbox.htm

fdl

$$$$

First they were in F1. Then they were in ferrari's. Now they are in BMW's. Tomorrow they will be in Acura's, etc. This is the way technology moves.

speedzer

thanks Dan for the site

so basically, "SMG" lets you upshift, and downshift with a flick of a wrist? so then ppl with automatics have this feature. i know its not the same thing. one being mainly auto and the other manual.

you see, my boss got me wondering about this type of tranny. he has a 911 Turbo 6 sp. well, he would talk about how the SMG in the M3 is more superior.

Dan Martin

http://www.acura-tsx.com/forums/showthread.php?t=10786

Junkster

I think the TT SMG is going to be the next big wave of things to come...

http://www.audiworld.com/news/03/020303/content.shtml

The twin clutch idea is fantastic and I have to hand it to Audi for actually bringing the tech to a mass produced model.

Junkster, who wonders when the Veyron will come out... wait, it never will at this pace

speedzer

wow...bosses sure do like 911s. my boss has the hardtop version. his rims have a big lip on it too. sure is sexy. he will not let me drive it but he did say that he will give me a ride. can't wait. :P

xizor

But the SMG M3 and that Ferrari both get plastered by their non-SMG models, it leads be to believe, nothing can beat a clutch

Dan Martin

Only in standing launches where wheelspin control is required. Otherwise SMG owns on a track.

Junkster

the manaul is a dying art, unfortunetly. With all the advancements of non-manual clutch systems coming into the mainstream, and more advancements on the way from F1 technology trickling down in the next 15 to 20 years, it wouldn't surprise me if the manual trannie is a very exclusive extra on cars.

Junkster, who would definitely miss all the footsy play of a manual

biker

SMG is going away in F1 in 2008 so there's not going to be much trickle down. My boss has an SMG M3 and guess what - it's in auto mode most of the time just like an AT. Then when he wants to play a bit (like in the Alps) he changes the gears himself - like you do in SS mode on a TSX. There's very little functionality diff betwen an AT and SMG for the typical street car.
It's going to take several generations of drivers in Europe to eliminate the MT desire.

rb1

Actually, I believe this is a DSG, which is an improvement on the SMG, which can only go between adjacent gears.


The DSG can go directly to any gear, but upshifts are optimized for the next sequential gear (and it can upshift about as fast as you can blink your eye )

mg7726

honda is researching their own version of smg, a 'simpler' and cheaper solution to audi's dsg design.

DEVO

Audi TT doesn't use SMG, it uses DSG. Which uses 2 clutches... dual sequential gearbox.

Gears 1, 3, 5 are on one clutch and 2, 4, 6 are on the other. DSG works great if the next gear that you want has been correctly selected. Their is a slight delay when it's the wrong gear that you want... system has to shift other clutch to get proper gear.

Anyway, a TRUE SMG gearbox blows the doors off any "simulated" auto box... such at the sportshift, tiptronic, craptronic, etc.


But a pure sports car will always be MT.

gfxdave99

Well yes, you have to remember that an SMG DMG whatever mechanically controlled manual transmission doesnt have a torque converter. The torque converter is what sucks power and is why a manual TSX is so much faster then an auto.