Method for calibrating a drive system for an axle of a motor vehicle, wherein the drive system comprises at least one electric machine as the drive unit, a drive shaft driven by the drive unit, a first output shaft and a second output shaft, as well as a first clutch connecting the drive shaft to the first output shaft and a second clutch connecting the drive shaft to the second output shaft, and moreover a control unit to regulate the drive unit and the clutches (9, 10) as well as to determine rotational speeds (12, 13, 14) of the drive shaft and the output shafts (7, 8); wherein the method involves at least the following steps: a) providing a first torque at the drive unit for a first operating point; b) determining a first actuating pressure for the first clutch, determining a second actuating pressure for the second clutch from a first characteristic diagram and applying the actuating pressures (16, 17) for the transmitting and apportioning of the first torque to the output shafts (7, 8) depending on the operating point; c) determining of a first actual differential rotational speed between the first rotational speed of the first output shaft and the drive shaft rotational speed of the drive shaft and a second actual differential rotational speed between the second rotational speed of the second output shaft and the drive shaft rotational speed of the drive shaft; d) either: adjusting a first calibrated actuating pressure for the first clutch until a first target differential rotational speed is achieved and adjusting a second calibrated actuating pressure for the second clutch until a second target differential rotational speed is achieved, or adjusting a first calibrated torque at the drive unit until a first target differential rotational speed on the first clutch and a second target differential rotational speed on the second clutch is achieved; e) creating a second characteristic diagram taking into account the calibrated actuating pressures (21, 23) or the first calibrated torque at the drive unit, wherein either the higher value of the actuating pressures (16, 17) is at first changed or both actuating pressures (16, 17) are changed at the same time in a weighting dependent on their value. a) providing a first torque at the drive unit for a first operating point; b) determining a first actuating pressure for the first clutch, determining a second actuating pressure for the second clutch from a first characteristic diagram and applying the actuating pressures (16, 17) for the transmitting and apportioning of the first torque to the output shafts (7, 8) depending on the operating point; c) determining of a first actual differential rotational speed between the first rotational speed of the first output shaft and the drive shaft rotational speed of the drive shaft and a second actual differential rotational speed between the second rotational speed of the second output shaft and the drive shaft rotational speed of the drive shaft; d) either: adjusting a first calibrated actuating pressure for the first clutch until a first target differential rotational speed is achieved and adjusting a second calibrated actuating pressure for the second clutch until a second target differential rotational speed is achieved, or adjusting a first calibrated torque at the drive unit until a first target differential rotational speed on the first clutch and a second target differential rotational speed on the second clutch is achieved; e) creating a second characteristic diagram taking into account the calibrated actuating pressures (21, 23) or the first calibrated torque at the drive unit, wherein either the higher value of the actuating pressures (16, 17) is at first changed or both actuating pressures (16, 17) are changed at the same time in a weighting dependent on their value.