SWITCHABLE TRANSMISSION ASSEMBLY

The invention relates to a switchable transmission assembly comprising a housing, an externally plug-engaged sun gear, and a first coupling gear which is arranged on one side of the sun gear, is similarly externally plug-engaged, and can be rotated about the same rotational axis, wherein the gears are coupled to each other in a torque-transmitting manner by means of a first axially slidable shiftsleeve which coaxially encloses the gears and which engages in a correspondingly internal plug-in manner, wherein the guide pin penetrates through an axial gap of a coaxial rotating shaft sleeve whichis axially fixed and rotatably supported on the shell in a tangential shape fit mode, the gear shifting roller is formed into a guide shaft sleeve which is fixed by the shell and partially and coaxially surrounds the rotating shaft sleeve in the axial direction, and a first guide concave part extends in the circumferential direction on the inner circumference of the guide shaft sleeve, the rotarybushing has a worm toothing extending in the circumferential direction in an axial region which is not radially covered by the guide bushing, the worm toothing engaging with a threaded spindle whichis rotatably mounted on the housing about its spindle axis.