What are the different types of limited-slip differentials and how do they work?

Limited-slip differentials (LSD) limit wheel speed difference to improve traction. Types include: Clutch-pack LSD (friction discs engage under torque), Viscous LSD (silicone fluid resists speed difference), Torsen (worm gear design reacts to torque difference), Active/electronic LSD (computer-controlled clutches), and Locking differentials (fully lock when engaged). Selection depends on application - clutch-pack for performance, Torsen for predictable response, electronic for integration with stability systems. LSDs improve acceleration traction and cornering stability.