The driving force can pick the method from the travel which may be- forward or reverse, park, neutral drive and Activity. The selected equipment sets the gear ratios along with the timing from the meshing mechanically. Computerized gearbox will come only with two pedals because it doesn’t involve clutch pedal. https://erickyxsng.mdkblog.com/39750267/new-step-by-step-map-for-automobile-gearbox