OEMs are keeping their options open on transmission supply, with many moving away from established in-house production and looking to source externally
Body panels, engines and transmissions are the fundamental component areas that the major carmakers tend to produce in-house. However, behind this established pattern lies a changing supply network for transmissions that involves some of the world’s major component suppliers and, on occasion, the cross-supply between vehicle companies. The situation in terms of in-house or external supply has shifted in favour of the suppliers in recent years with an increase in the use of continuously variable transmissions (CVTs) and dual clutch transmissions (DCTs), which in most cases are made externally.
Globally, between 65-70% of the transmissions market is supplied in-house by the car companies, a ratio that has remained broadly stable in the recent past. However, as CVTs and especially DCTs grow in popularity, the likelihood is that the ratio supplied by external suppliers will grow. The deal that saw the sale of Getrag to Magna included the supply of Ford transmissions – through a Getrag-Ford joint venture – making it a most significant development in the supply structure for transmissions.Magna-Getrag is one of four major global suppliers of transmissions, the others being Aisin and Jatco of Japan and ZF. Together these four companies have the vast majority of the external market for transmissions. In addition, Hyundai-WIA supplies within Korea and there are a number of specialist suppliers of sports transmissions in developed markets (such as Tremec which supplies manual transmissions for US sporty vehicles). There are also some other external suppliers in Japan, including Univance, which supplies transmissions for Nissan SUVs in Japan and sells into various Japanese vehicle manufacturers from its plants in North America and Thailand. Another source is Yanagawa Seki which specialises in manual transmissions for kei cars.
BMWMost of the European vehicle manufacturers make their own transmissions. The major exception is BMW, which sources many of its manual and all its DCTs transmissions from Getrag. Most of its automatic transmissions come from ZF. Aisin supplies transmissions for Mini and some front-wheel-drive BMWs. Interestingly, for the i3 and i8 electric vehicles, a single-speed gearbox is made by BMW itself in Germany. It seems likely that this business will grow as the i-series range widens.
Mercedes-BenzIn contrast to the situation at BMW, where transmissions are sourced externally, at Mercedes-Benz almost all are produced in-house. In Germany its main transmissions plants are at Gaggenau and the sprawling Unterturkheim complex in Stuttgart. ZF supplies transmissions for the Mercedes light commercial vehicle range, but its passenger cars use in-house produced units. Two important developments here have been the inauguration of DCT production in-house at Stuttgart – for use on the A-class and derivatives made on the MFA platform – and the decision to open a transmissions factory in Romania to cope with rising Mercedes production. The Romanian plant has also taken on DCT production as fitment of this transmissions type has increased, and the factory also assembles Mercedes’ new nine-speed automatic transmission, from largely German-produced components. Getrag supplies transmissions for the Smart range, both the ForTwo and the ForFour, which is made by Renault (and whose equivalent model, the Twingo, also uses Getrag).
In Europe, ZF and Getrag are the biggest companies, both with around one-third of the external market
Fiat-Chrysler AutomobilesJust over half of FCA’s transmissions are made in-house; Fiat units are made at three plants in Italy and at Betim in Brazil. The Chrysler arm’s main transmissions operations take place at Kokomo in Indiana, where there are actually three factories put to use. In Europe, Fiat makes mainly manual transmissions, sourcing Aisin automatics when required.
In the US, Chrysler uses ZF transmissions and has a licence to produce a nine-speed ZF automatic unit. This has been subject to a recent recall owing to the transmission slipping into neutral unexpectedly, a problem which has also affected Jaguar Land Rover as it uses the transmission on the Evoque. Chrysler vehicles still use some Mercedes transmissions, but these volumes are steadily declining.
FordAt Ford, the vast majority of transmissions have been sourced in-house, with the Ford-Getrag joint venture historically regarded as an in-house operation. These units should be regarded more properly as externally supplied, especially now that Magna has acquired Getrag. In addition to the Ford-Getrag operation, which has factories in France, Germany, Slovakia and the UK, Ford has transmissions plants of its own in Brazil (where it makes manual units for local demand) and three automatic transmission plants in the US – two in Michigan and one in Ohio.
General MotorsIn Europe, GM makes most of its transmissions in-house at Aspern in Austria, but sources automatic units from Aisin and ZF. Interestingly, it uses Aisin for the small number of manual transmissions its needs in the US. In North America, like Ford, it makes the majority of its transmissions in-house, including two plants in Mexico, at Silao and San Luis Potosi, which have received significant investment in recent years.
HondaIn almost direct contrast to BMW, Honda has traditionally made all its transmissions exclusively in-house. However, since 2014 the Acura brand has used the ZF nine-speed automatic transmission, which is also used by Fiat Chrysler and Jaguar Land Rover. For Europe, Honda imports transmissions from Japan, Asia and North America, whereas in the US it meets most of its transmission needs in its own plants in Mexico, Ohio and Georgia. The Ohio plant is one of the few vehicle manufacturer plants outside Japan that makes CVTs.
Honda has shown its development prowess in transmissions by filing a patent for an 11-speed multi-clutch unit; this was actually filed back in 2014 but news of this development only become public in the summer of 2016. Whether this will be used in a production vehicle remains to be seen – it has a 10-speed transmission that is due to come into use in the near future, but the company has not yet provided details regarding which models will use this (similarly both Ford and GM are reported to have 10-speed units in preparation).
Honda certainly illustrates very well the trend in recent years for an increased number of gears: as recently as 2012, Honda’s main volume models used five-speed automatics, so to move to up to 10 speeds within five years is remarkable. At the present time, its Acura models use seven-speed DCT units on the RLX sedan, while the ILX and TLX sedans have eight-speed DCTs and the NSX supercar, Honda’s halo model, currently uses as a nine-speed DCT
Hyundai-KiaHyundai and Kia are, like Honda, almost entirely self-sufficient in transmissions supply, either from Hyundai or from its chaebol affiliate Hyundai-WIA. In Europe, Hyundai’s Czech transmissions plant supplies both Hyundai and Kia (nearby in Slovakia) and in reverse the Kia engine plant in Slovakia supplies engines for both brands’ car plants. The situation is reversed again in North America where Kia runs the transmissions plant in Georgia for both brands, with Hyundai supplying engines.
PSA Peugeot-CitroënPSA makes its manual transmissions in-house, almost all at Metz and Valenciennes in France. Automatic units come from Aisin. Meanwhile, the French-Japanese group Renault-Nissan makes around 55-60% of its own transmissions; its main external supplier is Jatco, in which Nissan has a majority stake. Jatco supplies almost all the automatic and CVT units used by the group.
Renault-Nissan-DaimlerRenault still makes some automatic transmissions in Europe at its STA plant, which was formerly a joint-venture operation with PSA but is now wholly-owned by Renault. In Europe, Renault has manual transmissions plants in France, Spain, Portugal, Turkey and Romania. Nissan imports transmissions into the UK from Japan and Renault facilities in Europe, but makes transmissions for its LCV and pickup plant in-house at its factory in Barcelona, Spain.
In North America, where the Daimler-Renault-Nissan alliance has developed rapidly in recent years, Mercedes has licensed production of its nine-speed automatic transmissions to Nissan for use in Nissan and Infiniti models – these will actually be made by Jatco in Mexico. In Japan, Nissan’s in-house supply includes the former independent supplier Aichi.
ToyotaToyota is another of the vehicle companies that makes some of its own transmissions – for example at Walbrzych in Poland for its European models – and also sources significant volumes from various Aisin divisions; Toyota has a majority stake in Aisin. The Polish plant supplies all of Toyota’s European plants – in the UK, France and Turkey. CVTs, mainly used in Japan, are made at Toyota’s Hokkaido plant. The company also has its own transmissions plants in the US, India and China for its factories in those markets.
Volkswagen GroupAt the Volkswagen group, around four-fifths of its transmissions needs are made in-house, with the balance coming from Aisin and ZF, the latter mainly supplying Audi as DCTs for Porsche. VW has substantial transmissions plants in Kassel, Germany (making both manual and automatic units), Bratislava in Slovakia, Mlada Boleslav and Vrchabli in the Czech Republic (the Vrchabli plant is VW’s main DCT plant) and also in Spain, at a Seat factory in Barcelona. DCTs are also made in Dalian China, where a second DCT plant is being built.
Just as the company has expanded vehicle production in China in recent years, Volkswagen has also expanded DCT production in China and also added a new automatic transmissions plant in Tianjin. This factory opened in the summer of 2016, and will make around a quarter of a million units, which could be doubled in due course.
This will focus on supplying Audi and is in fact the OEM’s first own transmissions plant in the country. It will concentrate on the production of manual transmissions for the vehicles made on the MLB platform such as the Audi A4. Porsche has always outsourced its transmissions from Aisin, Getrag and ZF.