Positraction (sometimes called ”limited slip”) differentials are the part of the axle assembly that transfers driveline torque and power to the axleshafts and thus to the wheels and tires. They are different from so called “open” differentials in that they use clutch plates or cones to transfer that torque and power equally to both axleshafts until a certain “slip” torque at which point they will function like an “open” differential. This means that both rear tires propel the car forward under most power situations, but the tires can rotate at different speeds when necessary – such as in a sharp turn.
