To add to confusion, Subaru sells several very different systems and calls all of them the same "all time all-wheel drive". There is viscous coupling center dif

To add to confusion, Subaru sells several very different systems and calls all of them the same "all time all-wheel drive". There is viscous coupling center differential that goes with manual transmissions and nearly always splits torque 50/50 between front and rear, computer-controlled limited-slip clutch pack that comes with most automatics and changes torque split with speed, and some newer systems that do even more.