A drive control device of an automatic transmission of a vehicle. The transmission having a main oil pump driven by an internal combustion engine, an electrically driven auxiliary oil pump and a hydraulic control device; a device for determining the required volumetric flow rate needed to determine the oil/hydraulic target volumetric flow rate during current operating conditions, based on the transmission oil temperature; a device for determining the volumetric flow rate to determine the actual volumetric flow rate that can be delivered during the current operating conditions by the main and/or auxiliary oil pump, and a device for controlling the target volumetric flow rate to reduce the target volumetric flow rate to at least the currently deliverable actual volumetric flow rate, if the currently deliverable actual volumetric flow rate is below the current target volumetric flow rate.