 INDIANAPOLIS--BUSINESS WIRE--Allison Transmission, a leading designer and manufacturer of conventional and electrified vehicle propulsion solutions and the largest global manufacturer of medium- and heavy-duty fully automatic transmissions for commercial vehicles and transit buses, is pleased to announce that the Allison H 40 EPTM electric hybrid propulsion system will be integrated into the San Francisco Municipal Transportation Agencys SFMTA Municipal Railway Muni buses in partnership 