For most vehicles, There's two main kinds of gearboxes: guide and computerized. Handbook gearboxes are the ones where by You must change gears manually, using a clutch pedal and gear shifter (typically identified as a stick). You may look at a visual demonstration of guide gear transmission During this video https://automobilegearbox06161.bloggosite.com/41067567/the-best-side-of-automobile-gearbox