Microstar

If this report is true...good reason to hold off getting an MY'08 M5 where SMG becomes obsolete soon.

pinguhk

oops I just posted this item on other post, on well.
cool at last BMW are making 1.
I have a 7 speed autobox with something simaly two clutches, with peddle shift in my New Honda Stepwgn.
when I changing gear I can not feel it at all, itis so smooth.
This is a must buy for any car.

tachyon

True, but it would also mean there will be some great deals on 2008 M5s that are still sitting around next Spring - and on nice used M5s that get traded in for the upgraded model.

E60BEEMER

M-DCT, could someone explain what type of transmission this is?,

and Which models could it be on ?

Thanks

Ricracing

pinguhk

A twin-clutch gearbox or dual clutch transmission (DCT) is a semi-automatic transmission with separate clutches for odd and even gears. The outer clutch drives the odd numbered gears and reverse, while the inner clutch drives the even numbered gears. Shifts can be accomplished without interrupting power, by applying the engine's torque to one clutch just as the engine's torque is being disconnected from the other clutch. Since the synchronizers that select an odd gear can be moved while driving the car in an even gear, and vice versa, DCT's have been configured which shift faster than Formula One cars and other single-clutch AMT's (automated-manual transmissions, a.k.a. single-clutch semi-automatics); the shift can also be made smoother and more suitable for street-driving than a single-clutch AMT is capable of.

A twin-clutch gearbox eliminates the torque converter, which is a major source of parasitic loss in a traditional automatic transmission. However, dual clutch transmissions that are currently on the market use wet multi-plate clutches, similar to the clutches used in traditional automatic transmissions. Versions that use dry clutches, like those usually associated with manual transmissions, are rumored to be in development by several manufacturers.

This type of gearbox was invented by Andolphe K?gresse just before the outbreak of World War II, but he never developed a working model. The first actual DCT's came along in the 1980s when computers to control the shifts were compact enough: the PDK (Porsche Doppelkupplungs) used in the Porsche 956 and 962 Le Mans race cars and the Sport Quattro S1 race car.

http://en.wikipedia.org/wiki/Twin-clutch_gearbox

I think in the end they will put it in all cars cos itis the trend and itis 1000 times smoother.
But we will have to see cos if they do put itin all cars then the price will go up again.

BetterMakeWay

Fast and smooth ey? Well...i might not like that. Sure fast is good but also smooth? That might not be a good thing. Sometimes if not most of the times i like the agresiveness of the SMG3 that makes your head tilt with such ease. I hope the dual clutch tranny bmw will offer, will have a module to control the ferocity of the change.

In other words: IF i change the car then i change it because i'm tired of drivng fast and smooth I want smth that howls and gives neck pains at every shift

E60BEEMER

A twin-clutch gearbox or dual clutch transmission (DCT) is a semi-automatic transmission with separate clutches for odd and even gears. The outer clutch drives the odd numbered gears and reverse, while the inner clutch drives the even numbered gears. Shifts can be accomplished without interrupting power, by applying the engine's torque to one clutch just as the engine's torque is being disconnected from the other clutch. Since the synchronizers that select an odd gear can be moved while driving the car in an even gear, and vice versa, DCT's have been configured which shift faster than Formula One cars and other single-clutch AMT's (automated-manual transmissions, a.k.a. single-clutch semi-automatics); the shift can also be made smoother and more suitable for street-driving than a single-clutch AMT is capable of.

A twin-clutch gearbox eliminates the torque converter, which is a major source of parasitic loss in a traditional automatic transmission. However, dual clutch transmissions that are currently on the market use wet multi-plate clutches, similar to the clutches used in traditional automatic transmissions. Versions that use dry clutches, like those usually associated with manual transmissions, are rumored to be in development by several manufacturers.

This type of gearbox was invented by Andolphe K?gresse just before the outbreak of World War II, but he never developed a working model. The first actual DCT's came along in the 1980s when computers to control the shifts were compact enough: the PDK (Porsche Doppelkupplungs) used in the Porsche 956 and 962 Le Mans race cars and the Sport Quattro S1 race car.

http://en.wikipedia.org/wiki/Twin-clutch_gearbox

I think in the end they will put it in all cars cos itis the trend and itis 1000 times smoother.
But we will have to see cos if they do put itin all cars then the price will go up again.


thanks man thats meade a lot sof sense, i also checked out wikipedia too, thannks again

E60BEEMER

BD997

when this clutch does come out it will be in the new M3 cpe and sedan. It will only go on the F10 M5s in 2010... their will be no major changes to the M5 anymore until the F10 is out....