The original transmission product lineup at TMP-O started with production of 4-speed automatic transmissions (4AT) in 1996, followed by 5-speed automatic transmissions (5AT) in 2005 and 6-speed automatic transmissions in 2010. Today’s transmissions built at TMP-O include a continuously variable (CVT) pulley driven transmission and the two-motor hybrid system (HEV) transmission that is available in the Honda CR-V, Accord and Civic and is standard in the Prelude.

In 2014, the Ohio facility became the first major auto manufacturing plant in the country to derive a substantial amount of its electricity directly from wind turbines located on its property.* In 2019, TMP-O earned the U.S. Environmental Protection Agency (EPA) ENERGY STAR Certificate for Outstanding Energy Efficiency, becoming the first U.S. automotive transmission plant to earn this recognition. Most recently, associates initiated a project that installed furnace covers that prevent heat loss and save energy – and in 2025 these covers prevented the release of 164 metric tons of CO2 into the atmosphere.

Honda Manufacturing in Ohio

Honda has produced automobiles in Ohio for over 40 years, beginning in November 1982, with the start of automobile production at the Marysville Auto Plant (MAP), and today is the largest manufacturing employer in the state.

Honda established U.S. manufacturing operations in Marysville in 1979 with the start of motorcycle production. Today, around 15,400 associates support Honda manufacturing in Ohio, representing a total capital investment of $14.5 billion and the capacity to produce 460,000 Honda and Acura automobiles, 1.18 million automobile engines, and over 1 million automobile transmissions, as well as two-motor hybrid systems, using domestic and globally made parts.

The company’s five Ohio manufacturing facilities include three auto plants, the Marysville Auto Plant, East Liberty Auto Plant and Performance Manufacturing Center, as well as the Anna Engine Plant and transmission plant in Russells Point. The company has invested more than $1.3 billion in these facilities over the past five years, continually modernizing equipment and adopting new technologies to advance quality and efficiency for Honda and Acura customers here and globally. Honda now has the flexibility to produce gas-powered, hybrid and battery-electric vehicles on the same line in its Ohio auto plants.