Abstract: A clutch comprising a pair of relatively rotatable and axially movable drive members, each having torque transmitting abutments, a relievable resilient biasing means to bias the drive members axially towards each other so as to be disengagably connected in torque transmitting relationship by a plurality of torque transmitting elements which are interposed between the drive members and which are biased into torque transmitting relationship with the torque transmitting abutments by the biasing means when the clutch is engaged and relieving means to relieve the relievable resilient biasing means so that the torque transmitting elements are movable out of torque transmitting relationship with the torque transmitting abutments to disengage the clutch and a cage, which is free to rotate relative to both the drive members during disengagement, to guide the torque transmitting elements.