Technical Library

Technical

The Ultimate Differential - More Traction, More Speed As engine power outputs increase ever further, the ability to use this extra performance becomes more important. Wheelspin may look spectacular, but such loss of traction from either a standing start or exiting a bend wastes time, whether driving on the road, circuit, rally stage or drag strip. Fortunately, QUAIFE's patented Automatic Torque Biasing (ATB) Helical Limited Slip Differential (LSD) is an effective, well-proven, low-cost solution. As a direct replacement for the standard, factory-fitted 'open' differential, QUAIFE's ATB helical LSD unit can transform the performance of any vehicle. Unlike a conventional plate-type limited slip unit, QUAIFE's ATB Helical LSD unit relies on gears rather than clutch plates for its operation. That means it is much smoother in operation because, unlike a conventional plate-type LSD, it never locks harshly with a set pre-load of wheel slip across the driven axle. Rather, it automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree. Sets of floating helical gear pinions mesh to provide the normal-speed differential action. In the event of wheel slip, torque bias is generated by the axial and radial thrusts of the pinions in their pockets. The resultant friction forces enable the differential to transmit a greater proportion of the torque to the appropriate wheel. The effect is progressive and at no stage does the differential lock solid, hence the inherent safety and user-friendliness of the QUAIFE ATB Helical LSD unit. Reliability is total, making the QUAIFE ATB Helical LSD unit a true 'fit and forget' solution. The ATB units are designed using the latest CAD techniques and CNC machined to ultra-tight tolerances from high quality Corus steel billets. The completed units are then subjected to rigorous in-house inspection with 3D coordinate measuring machines before being dispatched to the customer. Such quality means that, unlike a conventional plate-type LSD, the QUAIFE ATB Helical LSD unit requires no special maintenance or rebuilds, is long-lasting, and retains the standard method of lubrication, making for an easy, pain-free upgrade. Proven in rallying, racing and on the road, the QUAIFE ATB Helical LSD differential offers safe, reliable, winning performance - everything you would expect from a QUAIFE product.