A torsen diff for short or a torque-sensing diff as it actually is works like this: The Torsen is based on a worm gear/ worm wheel relationship that allows the worm gear to turn the worm wheel but does not allow the worm wheel to turn the worm gear. Without getting too involved in the unit's complicated inner-workings, this one-way relationship causes the entire spinning process not to occur on a tire that has lost traction, while automatically allocating a majority of the available torque to the opposing tire (with a ratio that varies but can go as high as 9:1). By design, the unit divides differentiation and torque distribution into separate functions, allowing smooth, chatter-free cornering while maintaining maximum torque to both driven wheels. Because the unit is torque-sensing, power distribution is directly related to the traction available at each wheel. Unlike the True Trac (a similar worm gear differential), the Torsen does not require resistance at both wheels to activate its torque biasing process one tire can be completely off the ground and the unit will continue to distribute maximum torque to the opposing wheel.