For the Heavy Guys: The TC Tronic HD by ZF

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The success story of the ZF-AS Tronic automatic transmission family continues. In the meantime, it has proven its economy and flexibility in the entire commercial vehicle segment. The TC Tronic HD is applied particularly in crane trucks and heavy trucks with trailers: It combines the 12-speed AS Tronic with a torque converter clutch (WSK).

The TC Tronic HD (Heavy Duty) was developed by ZF to meet the requirements of engines with continuously increasing horsepower. It aims at applications in crane trucks and heavy trucks starting from 6 axes (72 tons) and has been designed for torques of up to 3500 newton meters. Like the AS Tronic, also the TC Tronic HD version enables the driver to engage gears in the manual mode, similar to the Tiptronic, or automatically.

For the TC Tronic HD, ZF engineers have combined the AS Tronic with a further developed torque converter clutch: the TC HD (Heavy Duty). This transmission is equipped with a speed-dependent secondary retarder, the ZF-Intarder. The latter is particularly suited for brake operations at speeds higher than 25 km/h. Another distinct feature of the TC Tronic HD is the possibility of maneuvering in open converter operation. A powerful pump for the supply of the hydraulic control unit and the oil circuit as well as a suitably designed cooling unit make sure that the temperature almost never reaches the critical threshold of 130 degrees Celsius. Moreover, the HD variant does not require an additional external oil tank. As the primary retarder has become obsolete, it was possible to integrate the oil supply required for the hydrodynamic torque converter into the housing. Upon request, this tank can be filled with 26.5 liters of the Ecofluid M oil which

has also been developed by ZF. On the one hand, this makes the final oil fill easier, and on the other hand, the Ecofluid M features higher mileages and longer oil change intervals which, in turn, leads to improved economy in service.

Press Contact:

Georg Ehling, Head of Marketing and Business Development

Phone: +49 7541 77-2199

Fax: +49 7541 77-90 2199

E-Mail: georg.ehling@zf.com