At the SAE International's Commercial Vehicle Engineering Congress in Schaumburg, Illinois, Allison Transmission announced the successful integration of its 4000 Series transmission with a Class 8 truck featuring a Hydrogen Internal Combustion Engine (H2-ICE) developed by Southwest Research Institute (SwRI). This H2-ICE vehicle exhibited emissions control capabilities that outperform the EPA/CARB 2027 and Euro 7 criteria pollutant emissions standards, contributing significantly to achieving ultra-low emissions. The integration highlights the critical role of internal combustion engine (ICE) powertrain solutions in advancing towards sustainability. Allison's automatic transmissions, which are fuel agnostic, provide flexibility for various fuel sources, including hydrogen, while ensuring durability and reliable performance. By compensating for the challenges associated with alternative fuels, such as lower power and slower engine response, Allison's technology enhances startability, drivability, and overall productivity. The hydrogen-fueled truck, part of the SwRI-led H2-ICE Consortium, aims to demonstrate the potential of hydrogen-fueled internal combustion engines in decarbonizing the transportation sector. These engines offer a substantial reduction in CO2 emissions compared to traditional diesel engines, positioning them as Zero CO2 Emissions Vehicles under future environmental standards in the U.S. and Europe.