DIWA.5 - Drive comfortably and economically


Start-up, shifting, braking, shifting...

Bus transmissions have to withstand quite a lot, especially in stop-and-go traffic. The DIWA.5 automatic transmission with E 300.1 control and ALADIN diagnosis software is the perfect solution:

Your line busses will be more comfortable and more economical.

DIWA.5 can be easily integrated into any vehicle concept. Decisive in areas with limited space, without pipe work or tubes outside and the integrated heat exchanger. Benefits for you as an operator are low maintenance and operating costs and high availability.


Voith Turbo GmbH & Co. KG
Market Division Road /
Bus Drive Systems Alexanderstraße 2
89522 Heidenheim, Germany

Sales Bus Drive Systems         Tel. +49 7321 37-8579
Fax +49 7321 37-7818

Power distribution

The long DIWA driving mode allows for stepless driving at lower speeds. The result is up to 50% less shifting compared to conventional automatic transmissions.

 Advantages for you:

  • Less wear
  • High cost-effectiveness
  • More comfort for passengers and drivers
  • Reduced thermal load of the engine cooling circuit


The design of the DIWA.5 transmission is simple, logical and clear. The main piece is the hydrodynamic offset converter. The pump brake, coupling, differential transmission and input coupling as well as the coupling for the overdrive are located to the front of it.

DIWA.5 Design
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Differential converter principle

starting range

All Voith DIWA transmissions work according to the power distribution principle. It provides even start-up and acceleration through a speed range in which other transmissions would have to shift 2 to 3 times.

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The differential converter, the core component of the DIWA transmission, works as a retarder when braking. Thus, it enables driving and braking with a hydraulic circuit.

The brake performance for average and high speeds is increased by up to 30% in comparison to conventional automatic transmissions.

The advantage is that the operating brake is relieved, thus reducing brake wear.

By constantly filling the converter with oil, a faster response time is achieved when activating the retarder. To deactivate the retarder, the transmission control merely opens a coupling. The retarder responds in a matter of seconds; thus, driving safety is increased.

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Technical data

Performance data for the DIWA.5-Transmission


 Types    D 824.5  D 854.5  D 864.5  D 884.5
Input power P1max  [kW]   180  220  290  320
Input torque M1max  [Nm]  650  1 100  1 600 1  1 900
Input speed n1max  [min-1]  2 500  2 500  2 500  2 200
 Retarder brake torque MBR  [Nm]  2 000 2  2 000 2  2 000 2  2 000 2
Dimensions transmission (dry)
incl. Retarder
 ca. 329  ca. 334  ca. 339  ca. 344
 Max. vehicle weight  [t]  15  28  28  34 3


1 1 700 Nm under certain conditions
2 Maximum value, depending on retarder configuration
3 abhängig von der Achsübersetzung

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Transmission control E 300.1

The intelligent control device E300.1 records vehicle acceleration and adjusts the gear-shifting points according to topography and load. The advantage for you is less fuel consumption in any driving situation.

Recording operating data

E300.1 offers a new dimension in recording operating data.
Vehicle and transmission usage conditions can be analyzed in detail using the saved data. The advantage for you is optimizing your vehicle use or selecting a suitable driveline.

Event memory

The control not only reports errors ....
... but also all identifiable events that indicate wear, faulty operation or necessary maintenance work... Causes can be precisely detailed and thus, quickly limited based on the diagnosis depth of the E300.1.

CAN push button and electronic type label

The CAN push button can be easily installed. It is convincing with its high degree of operating comfort and low susceptibility to failures.
The electronic type label (TIM) provides for optimum, automatic adjustment of the E 300.1 control on the transmission.

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SensoTop shifting program

The topography-dependent shifting program SensoTop optimally matches all gear-shifting points to acceleration, line profile and load

A tilt sensor provides transmission control with the information needed for stepless adjustment of gear-shifting points. The driver has the best engine power available for level roads or mountainous terrain and heavy or light loads.

Practice shows that depending on topography and vehicle use, you can save up to 7% in fuel. A significant contribution to economical and environmentally-friendly vehicle operation.

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DIWA.5 Driving comfort combined with economy

DIWA.5 Driving comfort combined with economy

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