Sensaud de Lavaud
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The Sensaud de Lavaud was a French automobile manufactured between 1926 and 1928. An unusual car, made in Paris by a M. Sensaud de Lavaud, it had automatic transmission and ifs by rubber in compression. The Alpax chassis was cast alloy, and it was powered by a steam-cooled 5475 cc six-cylinder engine of American origin. Few were built.
André Citroën had intended to use a gearbox based on Sensaud de Lavaud's principles in his 1934-launched 7A "Traction Avant," but it proved impossible for his engineers to perfect Sensaud de Lavaud's invention, and the 7A appeared with a conventional 3-speed unit.
[edit] References
David Burgess Wise, The New Illustrated Encyclopedia of Automobiles.