something like that..
"The computer controlled gearbox there are four shafts: two input shafts and two output shafts. The input shafts are concentric, with one shaft passing through the centre of the other hollow input shaft. There are two multi-plate clutch packs similar to those found in automatic transmissions. Each clutch pack connects one of the input shafts to the engine, so depending upon which is applied, either one of the two input shafts can transfer power. An oil pump at the rear of the gearbox supplies hydraulic pressure for the clutches.
The speed gears are divided between the two output shafts. First, third, fifth and reverse gear are on one output shaft while second, fourth and sixth gears are on the other shaft. Synchronisers are moved by the computer to lock each of the speed gears to their output shaft as required. Each output shaft has a pinion gear that drives the differential.
When the driver activate it , first gear is engaged inside the transmission, but the clutch doesn't engage until the driver steps on the gas. Because the clutch is running in oil, it can slip without burning up, allowing the car to creep along in first gear just as an automatic would. Step harder on the gas and the clutch is fully applied.
With the transmission engaged in first gear, the computer locks second gear to the other output shaft, but the input shaft clutch for that gear is not engaged. When it is time to shift, the computer releases the clutch for the first gear input and engages the clutch for the second gear input. In preparation for the next shift, the computer now shifts from first to third gear but leaves its clutch disengaged until the shift is requested. As the car's speed increases, the computer continues to pre-select the next gear so all it has to do is switch clutches. There is no grinding, no delays, and no shock"
Audi transmision
