The GTC4’s all-wheel-drive system, first seen in the FF, remains the simplest, most brilliant arrangement in the automotive universe. With the V-12 mounted completely behind the front wheels and the dual-clutch transmission by the rear wheels, adding front-drive would require a shaft from the output side of the transmission (the rear) going through the passenger compartment, under the engine, and to a front-mounted differential. That solution is complex and heavy, and it would likely require raising the engine to the detriment of speed, styling, and handling
Ferrari’s brilliant solution was to bolt a small second transmission to the front of the crankshaft. The power transfer unit has independent clutches for the front wheels, meaning it can provide real torque vectoring under power. It uses only two gears—one slightly taller than…