High bias Torsen T2R torque-biasing differential is a full-time torque-biasing system, not just a limited slip differential. The Torsen differential has a unique helical-gear design with no clutch plates or preload springs. It provides continuous, uninterrupted torque output, torque biasing, and differentiation in one integral unit. The Torsen greatly improves traction because it is continuously and instantly responding to torque feedback from the tires, sending more torque to the tire with the most traction.
The 4:1 TBR of the Torsen T2R means that this differential is capable of delivering up to four times as much torque to the tire with better traction than is delivered to the tire with the least available traction. Excellent for the tight turns typical of autocrossing.
By comparison, the standard Torsen T-2 can deliver about 2.5 times as much torque to both rear tires, collectively, as an open differential can, given the same conditions.
Torsen differentials have NO clutches or preload springs.
Ford equipped several Mustangs with a Torsen differential as original equipment: