I have a quaife diff in the race car.... it is very easy to drive with as it is NOT a true LSD - if you lift a wheel - you loose drive just like a normal diff but otherwise it biases drive .. well I'll let them explain ....
http://www.quaife.co.uk/What-is-a-Quaife-ATB-differential
Quote:
With an normal open differential, fitted as standard on most cars, much precious power is wasted through wheel spin under acceleration. This happens because the open differential shifts power to the wheel with less grip - along the path of least resistance.
The Quaife differential, however, does just the opposite. It senses which wheel has the better grip, and automatically biases the power to that wheel. It does this smoothly and constantly, and without ever completely removing power from the other wheel.
In cornering, while accelerating out of a turn, the QUAIFE biases greater power to the outside wheel, reducing inside-wheel spin. This allows the driver to begin accelerating earlier, exiting the corner at a higher speed.
The Quaife differential also controls loss of traction when the drive wheels are on slippery surfaces such as ice and snow or mud, providing the appropriate biased traction needed to overcome these adverse conditions. The Quaife ATB Helical LSD differential provides constant and infinitely variable drive. Power is transferred automatically without the use of normal friction pads or plates seen in other limited-slip designs.
... and it worked very nicely in the rain at Eastern Creek the other week...
The great thing with their new design is that you can use standard crown wheel and pot joint outputs.... reducing the cost considerably in setting it up ... that said still not cheap..(but cheaper than other LSD options). I've bought one for the Historic Rally car project.... (though have also got Pot Joint to Hardy Spicer fittings)
I'd have no hesitation in using them on the road from my experiences ...(and hence why got for the project)