Allison Transmission, in collaboration with Southwest Research Institute (SwRI), unveiled a Class 8 truck equipped with a hydrogen internal combustion engine (H2-ICE) at SAE International's Commercial Vehicle Engineering Congress in Schaumburg, Illinois. The integration of Allison's 4000 Series transmission in the H2-ICE truck showcases emissions control capabilities that exceed upcoming EPA/CARB 2027 and Euro 7 criteria pollutant emissions standards. Ryan Milburn, Vice President of Product Engineering at Allison Transmission, highlighted the importance of internal combustion engine (ICE) powertrain solutions in advancing ultra-low emissions in the industry. The H2-ICE vehicle displayed a remarkable 99.7% reduction in CO2 emissions compared to traditional diesel engines, positioning it as a Zero CO2 Emissions Vehicle under future environmental standards in the U.S. and Europe. The collaboration is part of a broader initiative led by SwRI through the H2-ICE Consortium, which includes key players in the engine and truck manufacturing industry. Launched with the goal of showcasing the potential of hydrogen-fueled internal combustion engines for decarbonizing transportation, the consortium aims to drive sustainable practices in the sector. Allison Transmission's fuel-agnostic transmissions provide flexibility to integrate with various fuel sources, including hydrogen, gasoline, natural gas, and propane. This adaptability ensures durability and reliable performance, supporting sustainability efforts in fleets without compromising productivity. By leveraging power shift technology and torque converter, Allison's transmissions enhance startability, drivability, and overall productivity, surpassing manual and automated manual transmission alternatives. The showcased H2-ICE truck underscores the promising future of hydrogen-fueled vehicles in achieving significant emissions reductions and promoting environmental sustainability.