Allison Transmission is the world's largest manufacturer of commercial-duty automatic transmissions, electric hybrid and fully electric propulsion systems. Over the last 100 years, we have been awarded more than 1,100 patents for our innovative, performance-driven products and features in applications ranging from transit to defense. We're committed to providing our customers around the world with the innovations they need when they need them.

The control system provides functional management of transmission and vehicle operations tailored to the expected duty of the vehicle. This is done using Input and Output (I/O) Functions. The combination of Input Functions and Output Functions that are used in a specific vehicle normally relate very closely with the expected use of the vehicle. The desired Inputs and Outputs must be selected when the vehicle builder defines the system calibration (SID). To learn more, visit hub.allisontransmission.com.

Since 1947, Allison Transmission has been leading the charge in innovative propulsion solutions for transit fleets. That charge continues as we drive cities across the globe toward full electrification.

Allison is passionate about moving propulsion technology forward and rethinking ways to evolve vehicles into full electrification. From our proven conventional and electric hybrid H 40/50 EP™ systems to our eGen Flex™ electric hybrid for transit buses and eGen Power® fully electric axles, we're determined to drive our cities into the future today.