How Hydra-Matic Transmission Changed the Automotive Industry
- October 20, 2020
- Transmission History
- Posted by admin
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Even if you’ve never heard of Hydra-Matic transmission, chances are, you’ve used the technology. Developed and described in Earl Thompson’s patent disclosures as far back as 1934, it changed the automotive industry. If you can’t drive a stick shift, you probably appreciate the ability to enjoy a fully-automatic transmission, and the Hydra-Matic marked the shift away from the clutch and the beginning of new freedom for drivers around the world.
Evolution of the Hydra-Matic Transmission
- Revisions in gearing and oil pump designs
- 1951- Introduction of a hydraulically-operated cone clutch to engage the new reverse planetary gearset
- 1952- Dual-Range Hydra-Matic that enabled two drive ranges to allow drivers to more effectively tackle hilly terrain and highway passing
- 1952- Expansion in the production of Hydra-Matic transmission units to 700,000 annually through licensing agreement
- 1953- Retooling of the vast Willow Run factory for Hydra-Matic production following devastation of the Detroit Transmission plant in Livonia
- 1956- Introduction of the second-generation Hydra-Matic in response to consumer complaints regarding harsh shifts
A Timeline of Hydra-Matic Brainpower
The changes made that allowed the Hydr-Matic the success it experienced was powered by a succession of innovative minds, each contributing unique and important details.
- 1934-1940- Earl Thompson, who first described Hydra-Matic transmission in 1934, left GM in 1940 to start his own company.
- 1940- O.K. Kelley becomes Thompson’s de facto successor and goes on to play an integral role in the future of GM’s transmission development efforts.
- 1940-1955- Oldsmobile general manager Charles McCuen promoted to vice president of engineering following Thompson’s resignation. He retired early following a debilitating accident.
- 1951-1969- Hydra-Matic early developer Harold Metzel serves as Oldsmobile’s chief engineer.