The driver can choose the mode of the push which can be- forward or reverse, park, neutral drive and sport. The selected gear sets the gear ratios together with the timing of your meshing mechanically. Automatic gearbox will come only with two pedals because it doesn’t require clutch pedal. Overdrive https://emilianohifbw.sharebyblog.com/33564636/automobile-gearbox-for-dummies