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A car has a number of mechanical parts that work together to make it move. Gears, fluids, fluids, and more fluids are the backbone of a car's working system. Springs and shocks keep it upright by "sprung"ing back into shape when something hits or presses on them. The starter motor gets the engine going so it can power the wheels using pistons and piston rings which move up-and-down inside the cylinders to turn gasoline into motion so you can go places! Understanding how these components work is vital for your safety as well as your mechanic's sanity. If you need to change a tire but have no idea how a car works, or if you're a mechanic who can't identify a cylinder from a shock absorber, then the first thing you need is an introduction. In this article we point out what those things are and tell you how they work..."Power from the engine is transmitted to the wheels through drive shafts and gearboxes."For most cars, the engine powers the drive shafts, which turn one or more gearboxes. Gearboxes have different numbers of gears inside them – usually five – that turn either one or two of the wheels at different speeds. So, for example, the engine may turn the drive shaft once every two revolutions (a high ratio) to make the wheels go very slowly; or it may turn them five times for every rotation (a low ratio) to make the wheels go very quickly. With no gears at all, one wheel would always turn at exactly the same speed as the engine. Some cars have two drive shafts, one for each of the rear wheels. They need this because it's more efficient to turn both of them at different speeds instead of turning just one faster than another. This makes the car corner more easily. "The brakes stop your car. Most of the time, when you use them the car stops itself without your help." "The brakes work by pushing back on the wheels with pistons, pushing them down and across in a way that is similar to the action of a lever. The closer they are to each other, and nearer to you and your foot, the better they work." Car brakes apply the brakes through a metal disc called a rotor which rubs against two metal pins called shoes. The brake pads (usually an asbestos-based compound that helps stop dust from getting into your engine) press on the rotor and shoe. The rotor is pushed down the car's hot engine-exhaust gases, so it can stop against the shoes. Brakes are also called brakes, or brakes. The braking action is limited by the mechanical way the brake shoes are attached to wheels. When you step on it, your foot pushes back on the shoe exactly in proportion to how hard it's stepped on, so that your foot doesn't move forward any more than it did when you stepped on it. When you release pressure from your foot, which pushes back on the shoe no longer at all, the whole shoe moves forward again at exactly the same speed as when you pressed down on it with your foot. cfa1e77820
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