housing 4 of an automatic transmission for a motor vehicle the travel direction of the motor vehicle is indicated by a co ordinate arrow x and the transverse direction to the travel direction by a co ordinate arrow y the structural unit 3 also called the pump aggregate has a longitudinal axis a which extends in the y direction i e transversely with respect to the travel direction of the motor vehicle inside the transmission housing which also comprises an oil sump or is closed toward the outside by an oil sump are arranged a hydraulic shifting unit hsu 5 and a transmission oil filter 6 the auxiliary oil pump 1 has a pressure connection 7 which is connected to the hydraulic shifting unit 5 and a suction connection 8 which is connected to the transmission oil filter 6 from which it draws in oil the pump aggregate 3 is fixed relative to the transmission housing 4 or the oil sump by three schematically represented struts 9 above the pump aggregate 3 behind the plane of the drawing a parking lock mechanism 10 is indicated schematically the electric motor 2 of the pump aggregate 3 is controlled and supplied with current by a pump control unit 11 arranged outside the transmission housing 4 via connection leads 12 the connection leads 12 between the pump control unit 11 and the electric motor 2 pass into and through the transmission housing 4 via an aperture 13 for its part the.