BMW makes double-clutch tranny for M3 V-8s
BMW announced today that it will make a new double-clutch transmission available on the 2009 M3, the sport-tuned version of its 3 series. A double-clutch transmission is really a manual transmission, but can be used like an automatic. Instead of requiring the driver to push a clutch pedal, the car's computer and actuators control two clutches. When the driver selects an upshift or downshift, the system engages one of its clutches and disengages the other, making shifts faster than a traditional manual. BMW previously developed its SMG, or sequential manual gearbox, which operated like a double-clutch transmission from the … Read more