overdrive gear ratio

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• Gear ratio — The gear ratio is the relationship between the number of teeth on two gears that are meshed or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt. General description In the… …   Wikipedia

• overdrive — ► NOUN 1) a gear in a motor vehicle providing a gear ratio higher than that of the usual top gear. 2) a state of high or excessive activity. ► VERB ▪ drive or work to exhaustion. DERIVATIVES overdriven adjective …   English terms dictionary

• Overdrive (mechanics) — For other uses, see Overdrive. An overdrive is sometimes a separate unit that fits into the back of a gearbox, as with this Fairey unit. A plate warns to only engage the unit in third and fourth gears …   Wikipedia

• Gear stick — A gear stick (also known as gearstick, gear lever, selection lever, shift stick and gear shifter) is the lever used to change gear in a vehicle, such as an automobile, with manual transmission or several common forms of automatic transmission.… …   Wikipedia

• overdrive — noun 1》 a gear in a motor vehicle providing a gear ratio higher than that of the usual top gear. 2》 a state of high or excessive activity. 3》 a mechanism allowing the exceeding of a normal operating level in equipment, especially the amplifier of …   English new terms dictionary

• overdrive — n. 1 a a mechanism in a motor vehicle providing a gear ratio higher than that of the usual gear. b an additional speed increasing gear. 2 (usu. prec. by in, into) a state of high or excessive activity …   Useful english dictionary

• economy ratio — An overdrive gear ratio better then 1:1 for economical cruising …   Dictionary of automotive terms

• overdrive — v. /oh veuhr druyv /; n. /oh veuhr druyv /, v., overdrove, overdriven, overdriving, n. v.t. 1. to push or carry to excess; overwork. 2. to drive too hard. n. 3. Mach., Auto. a device containing a gear set at such ratio and arrangement as to… …   Universalium

• Close-ratio transmission — A close ratio transmission is a transmission in which there is little difference between the gear ratios of the gears. Consequently, note that the word close implies near , not shut. The gear ratio numbers are in a smaller numeric range, hence… …   Wikipedia

• Hub gear — Sturmey Archer SX3 A Sturmey Archer AM bicycle hub gear mechanism wi …   Wikipedia

• Crawl ratio — is a term used in the automotive world to describe the lowest gear ratio a vehicle is capable of. The crawl ratio of a vehicle is affected by the entire drive train, including transmission, overdrive differential and tires, and can vary greatly… …   Wikipedia