The limited slip differential, or LSD, is a classical mechanical device that relies on friction clutches. As soon as there’s a speed difference between the left and right wheels, the arrangement of springs and cams inside the LSD causes pressure against the clutches that inhibits the differential speed. This keeps the power going to both wheels instead of having the power sent to the wheel with less traction.In a sports car such as the previous Porsche Cayman, the two-way LSD provides up to 22 percent locking when accelerating and up to 27 percent on the overrun. In either case, it makes the coupe more lively and enjoyable through corners – a degree of power oversteer out of turns and a tightening of the cornering line when lifting off the throttle pedal in the middle of a corner to quell understeer.
Together with an inherently ideal balance, and a light and precise steering, the Cayman with LSD is easy to handle and pure joy when its “slip” is being “limited” by its “differential”.