Editing Automatic transmission (section)

==Dual-clutch transmission (DCT)==
{{Main|Dual-clutch transmission}}
[[File:Dual-clutch transmission.svg|thumb|right|Schematic of a DCT]]
A ''dual-clutch transmission'' (DCT, sometimes referred to as a ''twin-clutch transmission'', or ''double-clutch transmission'') uses two separate [[clutch]]es for odd and even [[gear train|gear sets]].<ref name=AMS>{{cite journal|title=Powertrain — transmissions: Shift in power to the gearbox|url=http://www.unofficialbmw.com/images/SHIFT1.pdf|journal=[[Auto, Motor und Sport|AMS]]|publisher=UnofficialBMW.com|date=September–October 2003|access-date=31 October 2009|url-status=live|archive-url=https://web.archive.org/web/20110717164509/http://www.unofficialbmw.com/images/SHIFT1.pdf|archive-date=17 July 2011}}</ref> The design is often similar to two separate [[manual transmission]]s with their respective clutches contained within one housing, and working as one unit.<ref name="AEI">{{cite journal|title=Automatic-shifting dual-clutch transmissions are poised to grab share from traditional transmissions thanks to their combination of efficiency and convenience|url=http://www.dctfacts.com/documents/1-117-6-20.pdf|journal=AEI-online.org|publisher=DCTfacts.com|date=June 2009|access-date=31 October 2009|url-status=dead|archive-url=https://web.archive.org/web/20111007173150/http://www.dctfacts.com/documents/1-117-6-20.pdf|archive-date=7 October 2011}}</ref><ref name="PorschePDK_Glossary">{{cite web |title=Porsche Doppelkupplung (PDK) |url=http://www.porsche.com/microsite/technology/default.aspx?pool=uk&ShowSingleTechterm=PTPDopKuGe&Category=&Model=&SearchedString=&SelectedVariant=|publisher=Porsche.com |access-date=31 October 2009 |url-status=dead |archive-url=https://web.archive.org/web/20081205135604/http://www.porsche.com/microsite/technology/default.aspx?pool=uk&ShowSingleTechterm=PTPDopKuGe&Category=&Model=&SearchedString=&SelectedVariant=|archive-date=5 December 2008}}</ref> In most car and truck applications, the DCT functions as an automatic transmission, requiring no driver input to change gears.

The first DCT to reach production was the ''Easidrive'' automatic transmission introduced on the 1961 ''[[Hillman Minx]]'' mid-size car. This was followed by various eastern European tractors through the 1970s (using manual operation via a single clutch pedal), then the ''[[Porsche 962|Porsche 962 C]]'' racing car in 1985. The first DCT of the modern era was used in the 2003 ''Volkswagen Golf R32''. Since the late 2000s, DCTs have become increasingly widespread, and have supplanted hydraulic automatic transmissions in various models of cars.
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