To compliment the S85 V10, a seven-speed SMG only transmission was designed specifically for this car. This is the third generation version of BMW's SMG system, which is 20% faster than the previous generation. Shifts occur within 65 milliseconds. Much of this increase in response time is attributed not only to software changes, but the fact that this gearbox is mechanically only suitable for SMG use. To reduce shift throws and place high torque load gears near the transmission support bearings, the shift pattern of this Getrag box would be 2,4,6,7,5,3,R and 1st if looked at from a conventional manual shift pattern. 1st and second gears have triple fold carbon coated synchromesh while all higher gears have dual fold. To put it perspective how tight this gearbox is, sixth gear is a 1:1 drive ratio, and in 7th gear, cruising at 80 mph is keeps the engine at roughly 3000 rpm. Needless to say, seven gears are to many to manually shift for a streetcar, especially when mated to a twin disk Sachs clutch. This SMG Mk III is controlled by it independent transmission control unit (TCU) featuring a 16 bit 24 MHz processor. The Siemens TCU controls four electronic servo actuators that move in conjunction to alter the hydraulic circuit, which move the shift forks into the correct gear. Also controlled by the TCU is the hydraulic clutch cylinder for clutch engagement. Each system features its on set of hydraulic support systems, cooler, and sensor feedbacks.