• Porsche 911 7 Speed Manual Transmission Fluid Type
• Eaton 7 Speed Manual Transmission
• Porsche 911 7 Speed Manual Transmission Fluid Change

Schematic diagram of a dual-clutch transmission: This shows the layout of two side-by-side single-plate clutches. A dual-clutch transmission ( DCT) (sometimes referred to as a twin-clutch transmission or double-clutch transmission) is a type of. It uses two separate for odd and even.

It can fundamentally be described as two separate with their respective clutches contained within one housing, and working as one unit. Although usually operated in a fully automatic mode, many also have the ability to allow the driver to manually shift gears in semi-automatic mode, albeit still using the transmission's electrohydraulics. Contents.

History This type of transmission was invented by Frenchman just before, although he never developed a working model. If we discount the 'Easidrive' automatic transmission developed in the late 1950's by UK's Smiths Industries and Rootes, a system that used dual electro-magnetic clutches and was offered as an option on Hillman and Singer models, the first development of the twin-clutch or dual-clutch transmission started in the early part of 1980 under the guidance of at (AP), with prototypes built into the, and. Initially, the control systems were based on purely analogue/discrete digital circuitry with patents filed in July 1981. All of these early AP twin-clutch installations featured a single dry clutch and multiplate wet clutch. Following discussions with VW/Porsche, DCT work continued from Porsche in-house development, for Audi and Porsche racing cars later in the 1980s, when computers to control the transmission became compact enough: the Porsche Doppelkupplungsgetriebe (English: dual-clutch gearbox) (PDK) used in the and race cars from 1983, and the.

A dual-clutch transmission eliminates the as used in conventional epicyclic-geared. Instead, dual-clutch transmissions that are currently on the market primarily use two -bathed wet multiplate clutches, similar to the clutches used in most motorcycles, though dry-clutch versions are also available.

The first series production with a DCT was the 2003. As of 2009, the largest sales of DCTs in Western Europe are by various marques of the German, though this is anticipated to change as other transmission makers and vehicle manufacturers make DCTs available in series production automobiles. In 2010, on BMW Canada's website for the 3 Series Coupe, it is described both as a seven-speed double-clutch transmission and as a seven-speed automatic transmission. It is a dual-clutch automatic.

Overview In DCTs where the two clutches are arranged, the larger outer clutch drives the even-numbered gears and the smaller inner clutch drives the odd-numbered gears. Shifts can be accomplished without interrupting distribution to the driven roadwheels, by applying the engine's torque to one clutch at the same time as it is being disconnected from the other clutch. Since alternate gear ratios can preselect an odd gear on one gear shaft while the vehicle is being driven in an even gear (and vice versa), DCTs are the fastest-shifting road car transmission available and are able to shift faster than a professional racing driver using a manual transmission.

DCTs can shift more quickly than cars equipped with single-clutch automated-manual transmissions (AMTs), also called single-clutch semiautomatics. Also, with a DCT, shifts can be made more smoothly than with a single-clutch AMT, making a DCT more suitable for conventional road cars. Clutch types Dual-clutch transmissions use two fundamentally different types of clutches: either two wet multiplate clutches, bathed in oil (for cooling), or two dry single-plate clutches. The wet clutch design is generally used for higher torque engines that can generate 350 (258 ) and more (the wet multiplate clutch DCT in the is designed to cope with 1,250 N⋅m (922 lbf⋅ft) ), whereas the dry-clutch design is generally suitable for smaller vehicles with lower torque outputs up to 250 N⋅m (184 lbf⋅ft). However, while the dry-clutch variants may be limited in torque compared to their wet-clutch counterparts, the dry-clutch versions offer an increase in fuel efficiency, due to the lack of pumping losses of the transmission fluid in the clutch housing. Clutch installation Currently, three variations of clutch installation are used.

The original design used a concentric arrangement, where both clutches shared the same plane when viewed perpendicularly from the transmission input shaft, along the same centre line as the engine; when viewed head-on along the length of the input shaft, this makes one clutch noticeably larger than the other. The second implementation uses two single-plate dry clutches – side-by-side from the perpendicular view, but again sharing the centre line of the crankshaft.

A later variation uses two separate but identically sized clutches. These are arranged side-by-side when viewed head-on (along the length of the input shaft and crankshaft centre line), and also share the same plane when viewed perpendicularly. This latter clutch arrangement (unlike the other two variations) is driven by a gear from the engine crankshaft.

Suppliers BorgWarner supplies wet dual clutches and electrohydraulic control modules for these dual-clutch transmissions, along with complete dual-clutch transmission and assemblies. BorgWarner, which call their technology 'DualTronic', entered series production (excludes Bugatti Veyron) for Volkswagen Group, which renamed (DSG) in 2003 in the. The company signed further agreements with three other (unnamed) European automotive manufacturers to incorporate their components in DCTs. On 14 January 2009, BorgWarner announced a with the China Automobile Development United Investment Co., Ltd., which is owned by 12 Chinese automakers. This joint venture is known as the BorgWarner United Transmission Systems Co., Ltd., and is located in, China. The company has produced various dual-clutch transmission modules beginning in 2011. The uses BorgWarner components, including the dual-clutch module, clutch-control, shift-actuation systems, and synchronizer assemblies.

EATON developed the first dual-clutch transmission for class 6-7 trucks in North America - Procision. Fiat Powertrain Technologies developed a dual-clutch transmission with and BorgWarner called. Magneti Marelli produces the control system, which integrates BorgWarner's hydraulic actuation module into its own power and transmission control units. It can handle torque inputs of up to 350 N⋅m (260 lb⋅ft), making it the highest-torque dry-clutch application.

Its weight of 81 kg (179 lb), including oil and transmission control unit, its three-shaft architecture, especially axially, means it can be installed in several types of and vehicles. FEV GmbH developed a DCT with an integrated electric motor, providing hybrid capability. The 7H AMT Transmission provides seven forward speeds with multiple usage of gears (the electric drive can use unused gears from the combustion engine path): this aims to substantially reduce the complexity of the unit, as well as the package size and weight. Another spin-off from this design was the FEV xDCT that provides 10 forward speeds, but with the mechanical complexity of a standard six-speed DCT. Getrag has developed a range of DCT transaxles, including 7DCL750, a seven-speed transaxle for midengine longitudinal applications, capable of taking more than 750 N⋅m (553 lbf⋅ft). Getrag will provide its DCT in its first commercial applications, for the and and, from mid-2008.

Getrag has developed the 6DCT250 dry clutch DCT for use in front wheel drive transverse applications. With use of electromechanical actuation, rather than electrohydraulic, the 6DCT250 transmission surpasses the conventional manual transmission in fuel consumption and CO 2 emission. In the second quarter of 2008, Getrag had signed an agreement with to supply its PowerShift DCTs for use in American markets. However, due to the global economic downturn, this was subsequently cancelled. In 2006, Getrag was also working with to develop a DCT for use in. In 2015, Getrag introduced a new seven-speed, wet-clutch DCT, the 7DCT300, with a maximum torque of 300 Nm. The first application was the Renault Espace with a 1.6 L, Turbo GDI engine.

Getrag dual-clutch transmissions are used in the, sDrive35i, EDC, Mitsubishi Lancer Ralliart, vehicles. Graziano Italian specialist was in the process of developing a wet-clutch DCT for fitment into supercars. They planned to have it in production by 2010. Their DCT is aiming to have a torque-handling capacity of 750 N⋅m (553 lbf⋅ft), and they are also aiming to improve shift quality over their current AMTs. As of 2011, they supplied the seven-speed DCT for 's supercar with a shifting time of 50ms.

LuK designed and manufacture the dual dry single-plate clutch system for the Volkswagen Group seven-speed DQ200 (DSG) introduced in 2008. This DSG variant is used in smaller cars, with smaller-displacement engines with relatively low torque outputs. LuK are naming their technology 'XSG' for their overview of automated shift gearbox systems, and 'Parallel Shift Gearbox' for its own proprietary DCT. Ricardo English specialist consulting engineering company designed and built the Bugatti Veyron's seven-speed dual wet multiplate dual-clutch transmission, specifically to cope with the 1,250 N⋅m (922 lbf⋅ft) of torque generated. ZF , with, designed and now build the two different variants of the Porsche Doppelkupplungsgetriebe (PDK) seven-speed '7DT' dual wet multiplate clutch transmission. Applications Volkswagen Group.

Main article: released a wet-clutch 'PowerShift' transmission on the 2008 and. This wet-clutch DCT was designed with gearbox specialist Getrag under the Getrag Ford Transmissions, founded in 2001, and is expected to feature in other Ford and Volvo models.

Ford announced the US-market version of the Mark VI for 2011 featured a dry-clutch PowerShift transmission. Ford also announced the introduction of PowerShift transmission to North American market by 2010.

The Volvo version will be built in Koping, Sweden, at Volvo's transmission plant. The PowerShift gearbox will be introduced on the second-generation Volvo S60, and then on to the V50 and C30 models. The is expected to get this Ford PowerShift gearbox along with other new models to make more sporty cars. General Motors In the company's restructuring plan, it revealed that dry dual-clutch transmission would have been available in the 2012 calendar year. However, this plan was cancelled.

The GM dual-clutch gearbox was introduced on the, a. Had it been released, the new front-wheel drive transmission would have incorporated the latest innovations for improving fuel economy and performance.

The transmission alone would have provide upward of 10% improvement in fuel economy over today’s conventional six-speed automatic transmissions. The transmission co-developed between GM and features dry, dual-clutch technology. It would have provided shift comfort equal to a conventional fully automatic transmission, with superior quality, while reducing CO 2 emissions. Honda Honda implemented the eight-speed DCT in the Acura ILX and TLX. It is also the only company to pair their DCT with a torque converter to smooth low-speed crawling (a problem found in many traditional DCTs). The Acura NSX super car also uses a nine-speed DCT, which consists of launch gear and a cruising gear while seven gears in the middle are geared closer to each other.

The Sport Hybrid versions of the Acura RLX and MDX models both have a 7-speed DCT. Neither the 7 nor 9-speed DCTs contain a torque converter as the electric motors of the hybrid system already alleviate the rough slow start issue.

Motorcycles In October 2009, Honda launched the, a with a 1,237 cc (75.5 cu in) and optional DCT dubbed the Next Generation Transmission. In May 2009, Honda CEO mentioned that Honda was working on a new dual-clutch transmission system that could be matched with future hybrids. 2012 have dual-clutch models available: NC700SD, NC700XD and. It is the second generation from the six-speed dual-clutch transmission first used on the Honda VFR1200F. 2013 Honda introduced the CTX700DCT, a 670 cc dual clutch motorcycle selling as a 2014 model. The 2016 CRF1000L Africa Twin is available in both 3rd generation DCT and standard transmissions. The NC line has moved to the 3rd generation as well.

In 2016, Honda announced that they are studying a DCT for use in sport bikes as well. The 2018 Gold Wing and Gold Wing Tour will both offer a 7-speed automatic DCT. Hyundai The DCT transmissions used in some Hyundai and Kia passenger vehicles are supplied. At the 2009, unveiled concept car, which was said to feature a six-speed dual-clutch transmission.

Porsche 911 7 Speed Manual Transmission Fluid Type

Released the with the 6-speed EcoShift Dual Clutch Transmission in 2011. Released the and with the 7-speed EcoShift Dual Clutch Transmission in 2015. Released the and Tucson SUV with the 7-speed EcoShift Dual Clutch Transmission in 2016. Hyundai released the Elantra Sport with the 7-speed EcoShift Dual Clutch Transmission in 2017.

Hyundai's new Ioniq Hybrid offers a 6 speed transmission with dual clutch for 2017. John Deere introduced its DirectDrive dual-clutch transmission in 2012 in tractors. Currently the transmission is available in the 6R models, although it will likely be phased out in favour of the new AutoPower (AutoPwr) transmission on the new 6230R and 6250R, announced in 2016. The tractors are expected to be in full production by mid - 2017 and the transmission used in them is expected to be seen in future John Deere machinery across the whole range, such as Forage and Combine harvesters. The AutoPower joystick used in the 6230R and 6250R can achieve the top speed from one push of the toggle and has several buttons integrated onto the stick that are programmable for different features.

The tractors have also won the prestigious 'Machine of the Year' award 2017. Lotus has submitted a patent application for a lighter, simpler and more compact dual-clutch transmission system. The gearbox shown in the application is an eight-speed unit, with seven forward gears and reverse. McLaren Automotive introduced a seven speed dual clutch on made in.

The design comes with a feature called Pre-Cog that lets the driver preselect the next highest or lowest gear decreasing shift times. Mitsubishi.

Don't get burned by transmission burn out. Over time, transmission fluids break down and can become contaminated.

If the fluid isn't changed regularly or, even worse, an inferior product is used the transmission will operate poorly and eventually burn itself out. For initial fill or service refill, a transmission's best defense is Pentosin OE-quality Transmission Fluid from CRP Automotive. Pentosin offers a synthetic high performance Transmission Fluid program for use in today's automatic, manual, and even the new double clutch transmissions.

Eaton 7 Speed Manual Transmission

Formulated anti-wear chemistry and friction modifiers guarantee stable friction performance in modern transmissions. Pentosin Transmission Fluids are so superior they will not demonstrate their true performance characteristics when blended. For the best results when changing fluid brands, we recommend fully flushing your system, instead of just topping fluids off and/or before adding Pentosin.

Porsche 911 7 Speed Manual Transmission Fluid Change

The fact is, Pentosin technical fluids perform at such a high level that other fluids simply can't keep up. Important Notice: When changing, replacing, or topping off fluids, always check the vehicle owner's manual and/or reservoir tank for indication of what type of fluid was original fill. To download a PDF of our Pentosin Product Catalog.