Origine de la transmission automatique

[Pichoo]

J'ai un argument avec un copain.

La première transmission automatique de série sur une voiture américaine.

Il me dit Ford en 1936 et moi Cadillac dans les années 40.

Quelqu'un a t-il la réponse s.v.p?

[Ricardo A]

http://ask.yahoo.com/20011022.html

Voilà !

Les 2 dans le tort!

[Pichoo]

Thanks a bunch

Mai j'étais pas loin avec Cadillac! Olds en 38!

[Saintor]

Wikipedia is your friend.


Oldsmobile's 1940 models featured Hydra-Matic drive, the first mass-production fully automatic transmissions. Initially an Olds exclusive, Hydra-Matic had a fluid coupling (not a torque converter) and three planetary gearsets providing four speeds plus reverse. Hydra-Matic was subsequently adopted by Cadillac and Pontiac, and was sold to various other automakers, including Bentley, Hudson, Kaiser, Nash, and Rolls-Royce. From 1950 to 1954 Lincoln cars were also available with GM Hydra-Matic. Mercedes-Benz subsequently devised a four-speed fluid coupling transmission that was similar in principle to Hydra-Matic, but did not share the same design.

The first torque converter automatic, Buick's Dynaflow, was introduced for the 1948 model year.


http://en.wikipedia.org/wiki/Automatic_transmission