Viscous - A type of limited-slip differential. A viscous limited slip connects the driveshafts of the driven wheels with alternating plates immersed in a thick, snot-like, fluid. When all the plates are turning the same speed, the snot is just there for the ride. When one tire slips, there's a speed difference between the plates. This speed difference causes the snot to grab the slower-spinning plates to accelerate them to the same speed as the faster-spinning ones, thus transferring torque to the wheel with grip.
