A vehicle axle (10), including: a left axle (12L), a first side thereof being pivotally connected (50L) to a left wheel hub (14L); a right axle (12R), a first side thereof being pivotally connected (50R) to a right wheel hub (14R); a connector (20), disposed between second sides of the left (12L) and right (12R) axles for pivotally (28) connecting therebetween, for allowing pivotal motion therebetween; a first mechanism (52A,52B) for allowing and disallowing the pivotal motion between the left (12L) and right (12R) axles.