Driveline and method of controlling a driveline

The invention relates to a motor vehicle driveline and a method of controlling same. The driveline includes front wheels (11, 12) and rear wheels (14, 15), a controller (40) and a prime mover (11). Either the front wheels (11, 12) or all wheels are connected to the prime mover (11). The rear wheels (14, 15) may be connected via a prop shaft (23) with clutches (22; 27) at both ends. The decision to switch between 2WD and 4WD is taken on basis of speed-dependent trigger conditions.