Fuso Duonic dual-clutch-transmission – Click above to enlarge

Dual-clutch transmissions have become increasingly popular in small cars and have even appeared in high-performance machines like the Porsche 911 and Bugatti Veyron. Now, Mitsubishi Fuso has become the first commercial truck maker to offer one of these fancy new gearboxes in a hauler.

The new six-speed M038S6 "Duonic transmission" features wet clutches and incorporates the ability to creep in traffic for smoother operation. Although Duonic-equipped trucks will probably be driven mostly in fully-automatic mode, the transmission can also be manually shifted. Mitsubishi Fuso is 85-percent owned by Daimler, with the remainder being held by Mitsubishi.

[Source: Mitsubishi Fuso Truck and Bus Corporation]
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* Fuso is the first manufacturer worldwide to present a double-clutch transmission in commercial vehicles
* Known as the "Duonic", this double-clutch transmission combines automated driving with the advantages of a manual transmission

Stuttgart/Kawasaki - Fuso has presented a world first with a double-clutch transmission for commercial vehicles. The new transmission drives like an automatic transmission, but unlike a fully automatic torque converter transmission, it makes for lower consumption figures and therefore lower exhaust emissions. The double-clutch transmission is an automated manual transmission. As with a fully automatic transmission it is a two-pedal system, there is an accelerator pedal, a brake pedal and a selector lever. The selector lever allows automatic or manual gearshift mode to be selected.

The M038S6 "Duonic transmission" has six forward gears and a reverse gear. The P-function ensures safe parking by preventing the vehicle from rolling away. "Duonic" features a non-wearing wet clutch, which lowers maintenance costs by eliminating the need to replace worn clutch discs. A creep function has been added to the wet clutch, as is usual for automatic transmission with a torque converter. This enables the vehicle's speed to be easily controlled when moving slowly - for example when manoeuvring or in stop-and-go traffic - and hill-starts are also made easier.

More information about Mercedes-Benz - and a photo with the index number 10A846 - is available online: www.media.daimler.com.


Mitsubishi Fuso Truck and Bus Corporation (MFTBC) based in Kawasaki, Japan, is one of Asia's leading commercial vehicle manufacturers. In 2009 the company sold around 99,500 light, medium and heavy trucks and buses. Daimler AG holds 85 % of the MFTBC stock, the remaining 15 % being owned by Mitsubishi subsidiaries. MFTBC is part of Daimler Trucks within Daimler AG.

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