Rather than a conventional open diff, or even an LSD, there is no gears other than the permanently driven crownwheel and pinion. (evo.co.uk)
The front open diff can send up to 70 percent of its power to the rear, where every last bit can be distributed to either rear wheel. (automobilemag.com)
It doesn't give the impression of the car being pulled through a corner by a taut rope — but it is better than an open diff. (evo.co.uk)