Wavetrac Rear Limited Slip Differential LSD - 3.15+True traction, even when one wheel is completely unloaded. Wavetrac Differentials are advanced helical gear limited slip differentials designed, engineered, and manufactured in the USA by Autotech Driveline. Unlike conventional torque biasing differentials, Wavetrac units feature a patented internal cam device that actively maintains drive when one wheel loses loadsolving the biggest limitation of traditional helical LSDs. In situations where a