An automatic transmission is a multi-speed transmission used in motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions. Vehicles with internal combustion engines, unlike electric vehicles, require the engine to operate in a narrow range of rates of rotation, requiring a gearbox, operated manually or automatically, to drive the wheels over a wide range of speeds.
Overdrive is the operation of an automobile cruising at sustained speed with reduced engine speed (rpm), leading to better fuel consumption, lower noise, and lower wear. The term is ambiguous. The most fundamental meaning is that of an overall gear ratio between engine and wheels, such that the car is over-geared, and cannot reach its potential top speed, i.e. the car could travel faster if it were in a lower gear, with the engine turning at higher RPM.
A transmission is a mechanical device which uses a gear set—two or more gears working together—to change the speed or direction of rotation in a machine. Many transmissions have multiple gear ratios, but there are also transmissions that use a single fixed-gear ratio.
A manual transmission (MT), also known as manual gearbox, standard transmission, or stick shift, is a multi-speed motor vehicle transmission system, where gear changes require the driver to manually select the gears by operating a gear stick and clutch.
A semi-automatic transmission is a multiple-speed transmission where part of its operation is automated, but the driver's input is still required to launch the vehicle from a standstill and to manually change gears. Semi-automatic transmissions were almost exclusively used in motorcycles and are based on conventional manual transmissions or sequential manual transmissions, but use an automatic clutch system. But some semi-automatic transmissions have also been based on standard hydraulic automatic transmissions with torque converters and planetary gearsets.
A transaxle is a single mechanical device which combines the functions of an automobile's transmission, axle, and differential into one integrated assembly. It can be produced in both manual and automatic versions.
TorqueFlite is the trademarked name of Chrysler Corporation's automatic transmissions, starting with the three-speed unit introduced late in the 1956 model year as a successor to Chrysler's two-speed PowerFlite. In the 1990s, the TorqueFlite name was dropped in favor of alphanumeric designations, although the latest Chrysler eight-speed automatic transmission has revived the name.
A direct-shift gearbox is an electronically controlled, dual-clutch, multiple-shaft, automatic gearbox, in either a transaxle or traditional transmission layout, with automated clutch operation, and with fully-automatic or semi-manual gear selection. The first dual-clutch transmissions were derived from Porsche in-house development for the Porsche 962 in the 1980s.
The Lotus 18 was a race car designed by Colin Chapman for use by Lotus in Formula Junior, Formula Two, and Formula One.
The BC-series manual transmissions are a range of manual transaxles produced by Ford in Europe for its front-wheel-drive automobiles from 1976 onwards. Originally debuting in the Mk.1 Ford Fiesta, the unit was later used in Ford's other front-wheel-drive vehicles, most notably the Ford Escort and Orion.
Australian Formula 2, sometimes abbreviated to AF2 or ANF2, is a "wings and slicks" formula racing category in Australia. The category is one of Australia's oldest, dating back to 1964. The current format of AF2 was introduced in 1978. Brian Shead of Cheetah Racing Cars and Garrie Cooper of Elfin Sports Cars were largely responsible for the development of the format, which was devised to suit the needs of Australian drivers, most of whom had little or no sponsorship and had to bear the costs of racing out of their own pockets.
The Lotus 23 was designed by Colin Chapman as a small-displacement sports racing car. Nominally a two-seater, it was purpose-built for FIA Group 4 racing in 1962–1963. Unlike its predecessors Lotus 15 and 17, the engine was mounted amidship behind the driver in the similar configuration developed on Lotus 19.
Formula Super Vee was an open-wheel racing series that took place in Europe and the United States from 1970 to 1990. The formula was created as an extension of Formula Vee, a racing class that was introduced in 1959. Formula Super Vee in Europe was similar to F3 or Formula Renault today, a stepping stone to F1. In the United States, Formula Super Vee, often referred to as Super Vee, was a natural progression to Indy Car and Can-Am. On both sides of the Atlantic the series also was a platform for the promotion of VW products, similar to how Formula Renault promotes Renault products today.
The Borg-Warner 35 transmission (BW-35) is an automatic transmission produced by the BorgWarner company. This article also applies to variations—the M-36 and M-37. When this article refers to "M-3x" it refers to all models. When model number specific it will use the exact model number.
Kelmark Engineering was an American automotive specialty shop established in 1969 and based in Okemos, Michigan. It focused on high-performance custom V8 drivetrain swaps, the modification and production of rear and mid-engined cars, and custom-built turn-key automobiles. Until 1986, Kelmark Engineering manufactured kits and complete, finished, turn-key vehicles which were either Volkswagen-based or built on tubular race car-type frames. The outfit gained its name from Russ Keller and Randy Markham, the two co-creators who started the operation. Up until at least 1989, the Kelmark GT was still available as a kit albeit the manufacturer was Kelmark Motors in Holt, Michigan. The cars are all "rare" models, but the Volkswagen-powered Kelmark GT was the most popular.
The ZF 8HP transmission is ZF Friedrichshafen AG's trademark name for its 8-speed automatic transmission models for longitudinal engine applications. The name is short for 8-speed transmission with hydraulic converter and planetary gearsets. Designed and first built by ZF's subsidiary in Saarbrücken, Germany, it debuted in 2008 on the BMW 7 Series (F01) 760Li sedan fitted with the V12 engine. BMW remains a major customer for the transmission.
A dual-clutch transmission (DCT) is a type of multi-speed vehicle transmission system, that uses two separate clutches for odd and even gear sets. The design is often similar to two separate manual transmissions with their respective clutches contained within one housing, and working as one unit. In car and truck applications, the DCT functions as an automatic transmission, requiring no driver input to change gears.
A motorcycle transmission is a transmission created specifically for motorcycle applications. They may also be found in use on other light vehicles such as motor tricycles and quadbikes, go-karts, offroad buggies, auto rickshaws, mowers, and other utility vehicles, microcars, and even some superlight racing cars.
Colotti Trasmissioni is an Italian mechanical engineering firm located in Modena, Italy. It specializes in gears, limited-slip differentials and transmission systems for racing cars.
5HP is ZF Friedrichshafen AG's trademark name for its five-speed automatic transmission models for longitudinal engine applications, designed and built by ZF's subsidiary in Saarbrücken.
