Quaife Engineering is delighted to offer a portfolio of high performance Tran-X plate-style limited slip (LSD) differential units. Designed predominantly for motorsport use, the Tran-X LSD is a multiple plate, no-compromise, traction enhancing design which will transform the performance of any front or rear wheel drive vehicle still using a standard ‘open’ differential. Precision manufactured by Quaife Engineering from high tensile steel billets using advanced CNC machinery and to ISO 9001-2008 quality standards, Tran-X limited slip differentials are available for an ever-expanding range of modern and classic cars. Some applications are user configurable, enabling the Tran-X LSD to be tuned to suit individual driver preferences and performance requirements.
The Tran-X limited slip differential centre pack design incorporates two ramp blocks sandwiching two planet carrier pins, which are located in the radius between the differential’s leading and trailing ramp angle. As torque is applied to the Tran-X differential’s input, the pins ride up their respective leading ramps, pushing the blocks apart and increasing the transfer of torque across the axle, maximizing drive and traction.
The angle of this ramp determines how quickly this torque transfer occurs within the Tran-X limited slip differential unit. A ramp angle of 35 degrees allows the blocks to be pushed apart more readily that a 55 degree setting, resulting in a more aggressive differential locking action.
In addition, the differential preload setting within the Tran-X LSD defines the level of contact friction between the clutch plates themselves. The higher the preload, the more rapidly that friction increases between the plates, also creating a more aggressive differential action. Combined with the choice of ramp angles, this enables fine adjustment of the Tran-X limited slip differential’s torque transfer characteristics, allowing users to alter the dynamic handling balance of their car.
Typical Tran-X limited slip differential settings for a lightweight track car would be 45/90, allowing progressive application of power for optimum acceleration. Some Tran-X limited slip differentials feature dual ramp blocks, allowing ramp angles to be changed between two combinations, for example track and fast road settings (disassembly and reassembly of the Tran-X LSD unit is required.) Tran-X differentials with a less aggressive ‘super-lightweight’ plate setting (with a pre-load of 10-15 lb.ft) are also available for certain road and kit car applications to optimise performance and reduce operating noise.
Unlike the Quaife automatic torque biasing differential, the Tran-X LSD design uses internals with a finite service life. As such the Tran-X LSD will require regular maintenance as a function of the preload settings, intensity and duration of use.
To find the ideal Tran-X limited slip differential for your car, please contact the Quaife Technical Sales team for individual production selection advice – firstname.lastname@example.org