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    • 1989

      The Evolution of Automatic Transmissions Part 1 | Sonnax
      • The first production vehicle available in the U.S. with a CVT was the Subaru Justy in 1989. Nissan followed suit shortly after that, and utilized it in the majority of their small- to mid-size cars and sport utility vehicles.
      www.sonnax.com/tech_resources/982-the-evolution-of-automatic-transmissions-part-1-a-brief-history
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  2. Dec 2, 2022 · However, General Motors Corporation employees Edward A. Deeds and Charles F. Kettering developed the first automatic transmission widely employed in automobiles in 1924. They called their invention the “Clutchless Hydra-Matic” and introduced it in Oldsmobiles for the 1928 model year.

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  3. Many historians consider the first automatic transmission to be the one belonging to the 1904 Sturtevant horseless carriage, built by the Sturtevant brothers of Boston. This early automatic transmission had two forward speeds (but no reverse gear) and was driven by weights attached to the engine.

    • Stefan Kristensen
  4. Automatic transmissions have long been prevalent in the United States, but only started to become common in Europe much later. In Europe in 1997, only 10–12% of cars had automatic transmissions. [4] In 1957 over 80% of new cars in the United States had automatic transmissions. [3]

  5. The first mass-produced automatic transmission, the hydra-matic, was developed by GM in the late 1930s. The (hydraulic) automatic transmission is a significantly more complex piece of equipment than the sliding-gear manual gearbox - it relies on complex hydraulic systems and fluid dynamics principles, instead of the centuries-old mechanical ...

  6. Jul 7, 2023 · We explore the pioneering designs that aimed to reduce the effort required in shifting gears. From the friction-based systems of the 1920s to the groundbreaking hydraulic designs of the 1940s, each innovation paved the way for the automatic transmissions we rely on today.

  7. The first automatic transmission was invented in 1921 by a Canadian steam engineer, Alfred Horner Munro. Munro designed his device to use compressed air rather than hydraulic fluid so it lacked power and never became sold commercially.

  8. Oct 12, 2017 · Automatic transmissions with five and six forward gears were developed in the 1990s, while seven and eight-speed models starting being introduced in the 2000s. Nine-speed models are currently being developed and used by some manufacturers, including Jeep and Honda.

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