<Li> Torsen T - 2 was a new Gleasman design circa 1984 (US Patent application WO1984003745 A1) that is compatible with c - clip axles . The new design, along with a merger creating Zexel - Gleason U.S.A. increased Torsen availability for OEM and aftermarket applications . Variants include the T - 2R, which includes a Positraction style clutch pack that gives preload for racing purposes; and the T - 3, a dual differential intended for AWD applications . The T - 2 is original equipment in many high performance cars and pick - up trucks . </Li> <Li> Quaife differential, sold under the name Automatic Torque Biasing Differential (ATB), covered by European Patent No. 130806A2 . The Quaife version is most established in Europe and other markets other than the US, providing extensive aftermarket support for European and Japanese brand cars, especially front wheel drive and all - wheel drive applications . The Ford Focus RS uses the Quaife as original equipment . </Li> <Li> Eaton Corporation is the latest owner of the Truetrac differential, which has been quietly in production for many years . Its design is similar to the Torsen T - 2 (slightly less torque bias), and is an aftermarket part for many popular US - made solid axles for rear wheel drive and 4x4 pick - up trucks . The Truetrac is most often used in the front axle of 4x4 pick - up trucks intended for off - road use, in combination with locking center and rear differentials . As is the case with all geared LSD designs, the Truetrac does not have any negative impact on steering that most other LSD and "locker" designs are prone to . </Li> <P> Speed - sensitive differentials limit the torque difference between the outputs, Trq, based on the difference in speed between the two output shafts . Thus for small output speed differences the differential's behavior may be very close to an open differential . As the speed difference increase the limiting torque increases . This results in different dynamic behavior as compared to a torque sensitive differential . </P>

A torsen-style transfer case uses gears that are similar to a