Of course, cars and trucks (and bikes) have in excess of two gears to permit quick running at a wide range of speeds. The inner workings of the gearbox are fairly complicated, with different cogs, shafts and rods which make up the gears the mechanism to shift concerning them. https://gearbox-cvt19641.answerblogs.com/32531858/new-step-by-step-map-for-gearbox-cvt