Abstract: There is disclosed a throttle control means connected to the throttle which in response to operator input puts the throttle in one of two positions, the first fully open and the second an idle position, a transmission control system including desired speed input means responsive to operator input producing a signal indicative of the drive wheel speed desired by the operator, actual speed means connected to the drive wheels for generating a signal proportional to the road speed of the vehicle, comparing means connected to the desired speed and actual speed means and to the transmission for comparing the desired speed means and the actual speed means and, responsive to results from such comparing, generating a control signal changing the output-to-input speed ratio of the transmission.