[ROCKLOBSTER]

The funny thing about vehicles....unless there is a limited slip differential involved, two wheel drive is actually only one-wheel-drive, as the differential allows power to only one wheel at a time. Otherwise, on dry pavement, the "live axle" would hop when turning, and be very hard to steer.

Likewise, a 4WD vehicle is only two-wheel-drive, one front and one rear. Many trucks up here have limited slip differentials in the rear so they essentially have three-wheel-drive.

Many 4X4 competition vehicles have "lockers" or "spools" which defeat or outright eliminate the differential, since they are trying to get maximum power to the ground, and are spinning much of the time anyway.

(See: "CORE" and "Forumla 4X4 Hillclimb" on youtube)

[Jeff Chandler]

The funny thing about vehicles....unless there is a limited slip differential involved, two wheel drive is actually only one-wheel-drive, as the differential allows power to only one wheel at a time.

Helpful Hint:

When stuck in the mud/snow, etc., you can "fake" posi-traction by partially applying the parking brake.