Drive, comprising an electric motor and a transmission, and method for producing a drive, wherein the housing of the transmission comprises a housing part and a cover part, in particular which are connected to one another, a bayonet guide region is configured on the housing part, the electric motor comprises a rotor shaft and a motor housing, wherein the rotor shaft is mounted rotatably by means of at least one bearing in the motor housing, wherein an adapter flange is connected fixedly to the motor housing so as to rotate with it, wherein the adapter flange comprises a tongue region, in particular a bayonet lug, in particular for engaging behind the bayonet guide region, wherein the bayonet guide region protrudes into a recess of the housing part, wherein the recess is delimited in the circumferential direction by way of a retaining rib which is formed on the housing part and extends in the radial direction, in particular in relation to the axial direction of the driving shaft, from abearing seat of the bearing of the driving shaft of the transmission, in particular wherein the recess is delimited counter to the circumferential direction by way of a further retaining rib which isformed on the housing part and extends in the radial direction from a bearing seat of the bearing of the driving shaft.