A control system for controlling a differential (or slip) limiting force of a limited slip differential of a vehicle comprises a sensor group for sensing a vehicle speed and a wheel speed difference between rotational speeds of left and right drive wheels, and a controller for controlling the differential limiting force by controlling a clutch engagement force of a differential limiting clutch. To improve both of a driving capability on a split friction road surface or a rough road and a vehicle stability in the high speed range, the controller increases the differential limiting force with increase in the wheel speed difference according to a preset control characteristic, and modifying the control characteristic between the differential limiting force and the wheel speed difference so that the differential limiting force tends to be lower when the vehicle speed becomes higher.