Service for Trucks - VIAB - Support

VIAB Hotline

The team behind the VIAB Hotline consists of specialists from Voith Turbo who are able to provide worldwide support in all aspects of troubleshooting, commissioning and retrofitting. The VIAB Hotline service is designed to offer technical clarification on all questions relating to VIAB units.
The team is able to provide fault finding support as well as assistance with identifying correct spare parts numbers.

If you already know the part number, please contact our department for spare parts orders directly.

Technical Support
Spare Parts Order

To offer you specific and comprehensive advice, please let us have the following information:

VIAB type
Unit part number
Unit serial number
Vehicle manufacturer
Vehicle type
Date of first registration


Which of the two VIAB generations is built into my vehicle?

  • VIAB 433D in the Actros MP3 (WDB 934…)
  • VIAB 434D in the Actros new, Arocs, Antos (WDB 963... and WDB 964…)as well as Manitowoc mobile cranes

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Why may only 75W-90 multi-purpose transmission fluid be used in manual transmissions in conjunction with VIAB?

The VIAB freewheel is lubricated with transmission fluid. The 75W-90 multi-purpose transmission fluid ensures the freewheel function even at low temperatures.

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Why is a teach-in process required for the VIAB 434D?

The engine and VIAB work together closely in the vehicle. The engine and VIAB torques are subject to tolerances. To coordinate them the VIAB 434D and engine teach-in process includes both. The VIAB control unit contains the compensation factors.

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When does the teach-in process have to be performed for the VIAB 434D?

After a SW update in the VIAB control unit, after replacement of the control unit in the vehicle, after replacement of the VIAB assembly in the vehicle.

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How can the teach-in process be started?

The teach-in process can only be started with the Daimler XENTRY diagnostic tool. The process is fully automated and takes place with the transmission in neutral and the engine running.

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Why is it so important to maintain the precise oil level with the VIAB?

The space for oil and air in the VIAB assembly are precisely coordinated. An oil level that is too high or too low can result in oil foam that can seep out of the VIAB assembly with the exhaust. The oil is ejected as a result. For this reason, the oil level must be checked any time a leak is suspected. The extremely narrow oil fill quantity tolerance when replacing the oil (7.5 ± 0.3 l for VIAB 433D and 9.4 l ± 0.3 l for VIAB 434D) is due to this situation.

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VIAB Service Training

We offer product training courses that are tailored to your specific requirements.

Our experienced trainers offer a broad spectrum of subjects / courses:

  • Diagnosis, maintenance and repair for VIAB
  • VIAB design and function
  • VIAB operation
  • Training for workshop personnel, driving instructors, professional drivers, shipping companies, etc.



Please send your written application by regular mail, fax, or email to:

Voith Turbo GmbH & Co. KG
Gottfried-Linke-Straße 205
D-38239 Salzgitter

If you have any questions, please contact Ms Sabrina Lipok at +49 5341 21 5446 or Mr Sascha Koch at +49 5341 21 4872.


You will receive a confirmation with additional information three weeks prior to the start of the training course. Should you need to cancel a registration, please inform us promptly so that we can plan accordingly.


Voith Turbo GmbH & Co. KG
Mobility Service
Hardtstraße 8
74564 Crailsheim, Germany


Technical Support
Tel. +49 7951/32-1555

Spare parts orders
Tel. +49 7951/32-1644
Fax +49 7951/32-574

Ms Sabrina Lipok:
Tel. +49 5341 21 5446
Mr Sascha Koch:
Tel. +49 5341 21 4872

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Mobility service information system

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Mercedes-Benz Roadstars-Film

The wear-free Turbo Retarder Clutch combines the functions of a hydrodynamic start-up clutch and a primary retarder in a single component..


Turbo Retarder Clutch VIAB

Turbo Retarder Clutch VIAB

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