Allison Transmission announced the integration of the Allison 4000 Series transmission with a Class 8 truck equipped with a Hydrogen Internal Combustion Engine (H2-ICE) displayed by Southwest Research Institute (SwRI) at SAE International’s Commercial Vehicle Engineering Congress (COMVEC) in Schaumburg, Illinois.

The H2-ICE vehicle demonstrates emissions control capable of outperforming EPA/CARB 2027 and Euro 7 criteria pollutant emissions standards.

Allison fully automatic transmissions are fuel agnostic, offering optimal integration with any fuel source, including gasoline, natural gas, propane and hydrogen, delivering durability and reliable performance to strengthen sustainability initiatives without sacrificing fleet productivity and efficiency.

To compensate for the lower power and slower engine response associated with alternative fuels, Allison’s power shift technology and torque converter significantly improve startability, drivability and overall productivity, particularly as compared to competitive manual and automated manual transmissions (AMTs), the company says.

The truck, first unveiled at the 2024 ACT Expo in Las Vegas, is part of a broader initiative led by SwRI through its H2-ICE Consortium, which includes transportation industry leaders such as engine and truck manufacturers and Tier-I suppliers.

Launched in November 2022, the consortium aims to demonstrate the potential of hydrogen-fueled internal combustion engines for decarbonizing the transportation industry. Vehicles with H2-ICE engines achieve a 99.7% reduction in CO₂ emissions compared to traditional diesel engines, qualifying them as Zero CO₂ Emissions Vehicles under future environmental standards in both the US and Europe.