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How Gear Ratios Work

auto.howstuffworks.com/gears.htm

Gear ratios are what allow a car to reach a high rate of speed or climb a steep hill. Learn about gear ratios see examples of how gear ratios function.

How Horsepower Works

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Horsepower rates the engine performance of cars and even lawn mowers. Learn what horsepower means, how it is measured and how it works in high-performance cars.

How Tire Pressure Gauges Work

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If you have a car, chances are you also have a tire-pressure gauge. Learn how this pen-sized device measures air pressure and why the little stick inside doesn't just fly right out the back!

How a Manual Transmission Works

auto.howstuffworks.com/transmission.htm

Learn the basics of a manual transmission and explore transmission parts and the inner workings of transmissions.

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