How does a limited-slip diff work?
The principle of the limited-slip differential is that it offers more control over power delivery than a conventional 'open' diff. An open diff uses gears to ensure that the wheels turn at different speeds when going round corners, but when there is lots of power being delivered, it's easy for an open diff to be overcome by its delivery. When power arrives at the wheels, it looks for the path of least resistance, which in this instance means the tire with the least amount of grip. If you're heavy with the throttle in a powerful car, this can mean all the power evaporates in a cloud of smoke as the unloaded tire spins away while the other tire continues to grip.
Add an LSD, and extra mechanisms – usually in the form of a clutch assembly, cams, or even a viscous fluid system that's part of the diff – counter this natural flow of power to redistribute the engine's torque to the wheels with the most grip. The result is reduced wheelspin for the unloaded tire, and the car's power is put to the road more effectively, which will boost grip and therefore cornering and acceleration performance.
There are many types of LSDs, Viscous, Helical, Clutch-type. We consider the clutch-type as the most efficient which provides the best performance. Also it is the only that provides possibility of adapting it according to your requirements.
This Video explains how Clutch type LSD works.