System and method for transmission control

To the shift control system controls the speed of the vehicle, determine whether the ABS is operating while driving the vehicle and, if the ABS is operating and controls the transmission of the vehicle. The control after determining that the vehicle on the basis of the status information for the vehicle to shift control to the N-range when it is determined that they can shift control to the N-range, generates a shift control signal transmitted to the step-variable transmission to a speed change of the vehicle in the N-range do.