Editing Direct-shift gearbox (section)

===Audi longitudinal DSG===
In late 2008, an all-new seven-speed longitudinal<ref name=DCTfactsVWAG/><ref name=DCTfactsAudi7>{{cite web|title=Inside Audi's premium DCT |url=http://www.dctfacts.com/indusIn_pg3.asp |publisher=The Lubrizol Corporation |work=DCTfacts.com |date=8 May 2009 |access-date=27 October 2009 |url-status=dead |archive-url=https://web.archive.org/web/20091012031721/http://www.dctfacts.com/indusIn_pg3.asp |archive-date=12 October 2009 }}</ref> '''S tronic'''<ref name=DCTfactsAudi7/> version of the DSG transaxle went into series production (Volkswagen Group internal code: DL501, parts code prefix: 0B5).<ref name=ETKA/> Initially, from early 2009, it is only used in certain [[Audi]] cars, and only with [[longitudinal engine|longitudinally mounted engines]]. Like the original six-speed DSG, it features a [[concentric]] dual wet multi-plate clutch.<ref name=DCTfactsAudi7/> However, this particular variant uses notably more plates – the larger outer clutch (for the odd-numbered gears) uses 10 plates, whereas the smaller inner clutch (driving even-numbered gears and reverse) uses 12 plates.<ref name=DCTfactsAudi7/> Another notable change over the original transverse DSGs is the lubrication system<ref name=DCTfactsLubes>{{cite web|title=Special Transmissions Need Special Lubricants |url=http://www.dctfacts.com/hmStory2a.asp |publisher=The Lubrizol Corporation |work=DCTfacts.com |year=2009 |access-date=28 October 2009 |url-status=dead |archive-url=https://web.archive.org/web/20090406065635/http://www.dctfacts.com/hmStory2a.asp |archive-date=6 April 2009 }}</ref><ref name=dctSpecialLubes />  – Audi now utilise two totally separate oil circuits.<ref name=DCTfactsAudi7/> One oil circuit, consisting of {{convert|7.5|L|2}}, lubricates the hydraulic clutches and mechatronics with fully synthetic specialist [[automatic transmission fluid]] (ATF),<ref name=DCTfactsAudi7/> whilst the other oil circuit lubricates the gear trains and front and centre [[differential (mechanical device)|differentials]] with {{convert|4.3|L|2}} of conventional [[spiral bevel gear|hypoid]] [[gear oil]].<ref name=DCTfactsAudi7/> This dual circuit lubrication is aimed at increasing overall reliability, due to eliminating cross-contamination of debris and wear particles.<ref name=DCTfactsAudi7/> It has a torque handling limit of up to {{convert|600|N·m|lbft|abbr=on}},<ref name=DCTfactsVWAG/> and engine power outputs of up to {{convert|330|kW|PS bhp|lk=on|abbr=on}}.<ref name=DCTfactsVWAG/> It has a total mass, including all lubricants and the dual-mass flywheel of {{convert|141.5|kg|lb|abbr=on}}.<ref name=DCTfactsVWAG/>

This was initially available in their [[quattro (all wheel drive system)|quattro]] [[all-wheel-drive]] variants,<ref name=ETKA/> and is very similar to the new [[ZF Friedrichshafen]]-supplied<ref name=ZF_PDK>{{cite web|title=ZF 7-speed dual clutch transmission|url=http://www.zf.com/corporate/en/products/product_range/cars/cars_7_speed_dual_clutch_transmission.shtml|publisher=[[ZF Friedrichshafen|ZF Friedrichshafen AG]]|work=ZF.com|access-date=28 October 2009|archive-date=27 November 2011|archive-url=https://web.archive.org/web/20111127040105/http://www.zf.com/corporate/en/products/product_range/cars/cars_7_speed_dual_clutch_transmission.shtml|url-status=dead}}</ref> ''[[Porsche]] Doppel-Kupplung'' (PDK).<ref name=DCTfactsPorsche>{{cite web|title=Top 911 moves to industry-standard shift controls |url=http://www.dctfacts.com/lnws_pg12a.asp |publisher=The Lubrizol Corporation |work=DCTfacts.com |date=24 September 2009 |access-date=27 October 2009 |url-status=dead |archive-url=https://web.archive.org/web/20091016233534/http://www.dctfacts.com/lnws_pg12a.asp |archive-date=16 October 2009 }}</ref><ref>{{cite web|title=Porsche Joins the DCT Set |url=http://www.dctfacts.com/hmStory3.asp |publisher=The Lubrizol Corporation |work=DCTfacts.com |access-date=28 October 2009 |url-status=dead |archive-url=https://web.archive.org/web/20091001073909/http://www.dctfacts.com/hmStory3.asp |archive-date=1 October 2009 }}</ref>