An LSD or limited slip differential works just like an open diff, sending power to both wheels while allowing them to spin at differnt speeds. the differnce is that where as a standard open diff will imidiately route power through the path of least resistance when the wheels rotate at differnt speeds, (ie more power to the wheel thats slipping) an LSD will resist that action, sending power equaly to both wheels as long as the difference in rotational speeds is within a certain threshold. but eventualy an LSD will let go just like an open diff. the full customize LSD in GT3 allows you to set the level of lock that occurs under acceleration, coasting, and breaking, I like to set the accel side to full lock while leaving the initial and decel side open. the abs system in GT3 does a good enough job keeping the vehicle stable under breaking, and you want the wheels to be able to rotate freely in the corner so as not to disrupt the rotation of the vehicle and slow down cornering speeds just like ASM. cornering is a constant deviation from a strait path. in essence controlled instability. so any device that creates stability hinders cornering. But you need the locking on the accel side so that both wheels can power you out of the corners.
