Q:

What are some different shifter diagrams?

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Quick Answer

Typical manual transmission shift pattern diagrams use a so-called "H-pattern" layout, where each gear is at the end of one or more channels in the shifter that form a series of interconnected figures shaped like the letter "H." However, some manual transmission use a sequential pattern in which each gear is shifted in sequence through a single line. A sequential pattern is also typical of automatic transmissions, though in these transmissions the shifter moves through park, reverse, neutral and drive.

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The most common manual transmission shift patterns place first gear at the upper-leftmost position of the H-pattern of the shifter, with each odd gear placed to the right sequentially of first gear and each even gear placed opposite of the corresponding odd gear at the bottom of the H-pattern. For example, second gear is at the bottom left corner of the H pattern opposite to first gear.

An exception to the standard shifter pattern, known as a "dog-leg" gearbox, places first gear in the bottom-right corner of the H-pattern and second gear at the top right corner diagonally from first gear. This pattern is often used in heavy vehicles and sports cars where first gear is usually only used to start from a standstill because it allows for a more direct shift from second gear to third gear.

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