Make no mistake, the Christini is not two-wheel drive. The reason is the amount of power transmitted to the front wheel. The Christini's front drive runs full-time, but with a mechanical reduction. The rear wheel always goes faster, keeping the front tire "free-wheeling" ahead of the power coming to it. When the rear wheel slips, the power "catches up" with the front tire and starts driving it. It's a "dumb" system-no electronics or sensors-that acts like traction control.