Voith Retarder 115 CT – a step-up gear retarder with high braking torque

    The Voith 115 CT is a step-up gear retarder with a high braking torque. It has a self-contained oil supply system and is integrated into the vehicle’s braking management system. In conjunction with the service brakes, it provides optimal braking action. At the same time, the retarder increases riding comfort, for example via the v-constant function that keeps speed constant downhill, in the same way as downhill cruise control, without the additional use of the service brakes.

    Functional principle


      Service – where your truck is in good hands

        Whether it’s maintenance or repairs, troubleshooting, or the functional testing of individual components: our professionals will make sure you stay on the road. At the Voith retarder workshop in Crailsheim, and throughout the world.

        Judge us by our performance

        • Onboard troubleshooting and upgrade 
        • Replacement and repair 
        • Repair of supplied retarders (all model series) 
        • Troubleshooting and functional testing of individual components 
        • Worldwide delivery of Voith original spare parts, as well as 
        • replacements and basic retarders

        Retarder oil list

        Do you have any questions about Voith Retarder 115 CT? We’re here to help!

          Service contact

          Voith GmbH & Co. KGaA

          Mobility Service

          Hardtstraße 8 74564 Crailsheim, Germany


          t +49 7951 32-531

          Technical Support

          Technical Support


          t +49 7951 32-1555

          f +49 7951 32-1506

          Spare parts orders

          Spare parts orders


          t +49 7951 32-1644

          f +49 7951 32-756