The Quaife Differential powers both drive wheels under nearly all conditions.
In drag-race style, straight-line acceleration runs, the Quaife provides close to ideal 50/50 power split to both drive wheels, resulting in essentially twice the grip of an ordinary differential. When accelerating our of a corner, the Quaife biases power to the outside wheel, reducing inside-wheel spin. The Quaife also controls loss of traction when the front wheels are on slippery surfaces such as ice and snow or mud, providing the appropriate biased traction needed to overcome these adverse conditions. Power is transferred automatically without the use of normal friction pads or plates seen in other limited-slip designs.
The Quaife is extremely strong and durable, and since it is gear operated, it has no plates or clutches that can wear out and require costly replacement. Great for street driving or racing. Racers don't have to put up with locking mechanisms or spools that created unwanted understeer under power, or in the case of front-drive cars, even tear the steering wheel out of their hands when cornering. Because it behaves like an open differential during ordinary driving, street drivers will have trouble telling it's there until pushing the car's limits.
The Quaife has been proven in everything from SCCA Rally to Formula 1.