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  2. Close-ratio transmission - Wikipedia

    en.wikipedia.org/wiki/Close-ratio_transmission

    The designation of wide versus close ratio affected the lowest gear ratio; for example, the four-speed Muncie transmissions offered in General Motors performance vehicles included the M20 "wide ratio" transmission, which had a first gear ratio of 2.52 or 2.56:1, while the M21 and M22 "close ratio" transmissions had a first gear ratio of 2.20:1.

  3. Continuously variable transmission - Wikipedia

    en.wikipedia.org/wiki/Continuously_variable...

    Manumatic. Dual-clutch. Continuously variable. Automated manual. v. t. e. A continuously variable transmission ( CVT) is an automated transmission that can change through a continuous range of gear ratios. This contrasts with other transmissions that provide a limited number of gear ratios in fixed steps.

  4. Worm drive - Wikipedia

    en.wikipedia.org/wiki/Worm_drive

    Given a single-start worm, a 20-tooth worm wheel reduces the speed by the ratio of 20:1. With spur gears, a gear of 12 teeth must match with a 240-tooth gear to achieve the same 20:1 ratio. Therefore, if the diametrical pitch (DP) of each gear is the same, then, in terms of the physical size of the 240 tooth gear to that of the 20 tooth gear ...

  5. Steering ratio - Wikipedia

    en.wikipedia.org/wiki/Steering_ratio

    The steering ratio is the ratio of the number of degrees of turn of the steering wheel to the number of degrees the wheel (s) turn as a result. In motorcycles, delta tricycles and bicycles, the steering ratio is always 1:1, because the steering wheel is fixed to the front wheel. A steering ratio of x:y means that a turn of the steering wheel x ...

  6. Plymouth Valiant - Wikipedia

    en.wikipedia.org/wiki/Plymouth_valiant

    Manual steering ratio was changed from 20:1 to 24:1, and both power and manual steering gearboxes were new, the latter now housed in aluminum rather than iron. Most of the front suspension components were redesigned (now with balloon seals, an industry first), and it was claimed they needed lubrication only every 32,000 mi (51,000 km).

  7. Manual transmission - Wikipedia

    en.wikipedia.org/wiki/Manual_transmission

    Internals of a Getrag 282 manual transmission for a front-wheel-drive vehicle ( Oldsmobile Cutlass) A manual transmission ( MT ), also known as manual gearbox, standard transmission (in Canada, the United Kingdom, and the United States), or stick shift (in the United States), is a multi-speed motor vehicle transmission system, where gear ...

  8. Transmission (mechanical device) - Wikipedia

    en.wikipedia.org/wiki/Transmission_(mechanical...

    A transmission (also called a gearbox) is a mechanical device which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/reduction in a machine. [1] [2] Transmissions can have a single fixed-gear ratio, multiple distinct gear ratios, or continuously variable ratios. Variable ...

  9. Ratio - Wikipedia

    en.wikipedia.org/wiki/Ratio

    A ratio that has integers for both quantities and that cannot be reduced any further (using integers) is said to be in simplest form or lowest terms. Sometimes it is useful to write a ratio in the form 1:x or x:1, where x is not necessarily an integer, to enable comparisons of different ratios. For example, the ratio 4:5 can be written as 1:1 ...

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