Abstract: The transmission is of the type in which a spherically curved working face (44) on one transmission member (3) and freely rotatable transverse rollers (17) on the other transmission member (2) of this pair of members are provided, the axes of rotation of the transverse rollers lying in a common plane and this plane running perpendicularly to the axis of rotation (18) of the element (3). The transverse rollers are engaged by means of frictional engagement with the working face for the purpose of torque transmission, a change of speed being effected by varying the relative position of the two members (2, 3).In order to prevent an undesirable radial change in the axial position of the transverse rollers (17), a stop (42a, 72) which is preferably designed to be adjustable is provided.