The most significant improvements and innovations in automatic transmissions occurred during World War II, when Buick developed a torque converter for tanks. This torque converter was applied to the automotive industry in 1948. In 1950, Ford models began using 3-speed automatic transmissions, still employing a combination of a torque converter and planetary gears. In 1977, Chrysler invented a torque converter with a lock-up clutch, improving fuel economy and reducing oil temperature.
In the 21st century, torque converter technology continued to develop, and the global market size was approximately $7.59 billion in 2024. In May 2024, Schaeffler launched the LuK TorCon 6L80 torque converter.
In the Chinese market, the torque converter market size reached approximately 15 billion RMB in 2024. The industry exhibits three major development trends: new energy vehicles, the integration of intelligent technologies, and market expansion in construction machinery. It is estimated that by 2030, the demand for hydraulic torque converters in new energy vehicles will account for more than 50%, and the Chinese market size is expected to reach approximately 30 billion yuan.
