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2. Semi-automatic transmission - Wikipedia

   en.wikipedia.org/wiki/Semi-automatic_transmission

   Other examples of semi-automatic transmissions based on hydraulic automatics were the Ford 3-speed Semi-Automatic Transmission used in the 1970–1971 Ford Maverick, early versions of Honda's 1972–1988 Hondamatic 2-speed and 3-speed transmissions, and the Daihatsu Diamatic 2-speed transmission used in the 1985–1991 Daihatsu Charade.

3. List of GM transmissions - Wikipedia

   en.wikipedia.org/wiki/List_of_GM_transmissions

   GM's Automatic Safety Transmission (AST) was a semi-automatic transmission released in 1937. The first mass-produced fully-automatic transmission developed for passenger automobile use was the GM Hydramatic introduced in 1940. [1] The Hydramatic was a big success, and had been installed in the majority of GM models by 1950.

4. Automatic transmission - Wikipedia

   en.wikipedia.org/wiki/Automatic_transmission

   [44] [45] [46] Another early example of this transmission system was introduced in the 1955 Citroën DS, which used a 4-speed BVH transmission. This semi-automatic transmission used an automated clutch, which was actuated using hydraulics. Gear selection also used hydraulics, however, the gear ratio needs to be manually selected by the driver.

5. List of Chrysler transmissions - Wikipedia

   en.wikipedia.org/wiki/List_of_Chrysler_transmissions

   Semi-automatic. 1941–1942 M4 Vacamatic — 4-speed ... 1953–1954 Hy-Drive — 3-speed manual transmission behind a torque converter; Automatic

6. Semi-trailer truck - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer_truck

   However, all truck manufacturers now offer automated manual transmissions (manual gearboxes with automated gear change), as well as conventional hydraulic automatic transmissions. Semi-truck transmissions can have as few as three forward speeds or as many as 18 forward speeds (plus 2 reverse speeds). A large number of transmission ratios means ...

7. Transmission (mechanical device) - Wikipedia

   en.wikipedia.org/wiki/Transmission_(mechanical...

   An automated manual transmission (AMT) is essentially a conventional manual transmission that uses automatic actuation to operate the clutch and/or shift between gears. Many early versions of these transmissions were semi-automatic in operation, such as Autostick , which automatically control only the clutch , but still require the driver's ...

8. Presto-Matic - Wikipedia

   en.wikipedia.org/wiki/Presto-Matic

   The M6 Presto-Matic was a Chrysler Corporation semi-automatic transmission produced from 1946 to 1953. It was a special manual transmission with a fluid coupling.Although it had just two forward gears, an electric overdrive unit was attached and useful in either gear for a total of four forward speeds.

9. M939 series 5-ton 6×6 truck - Wikipedia

   en.wikipedia.org/wiki/M939_series_5-ton_6×6_truck

   All models of the M939 share a common basic chassis, cab, hood, and fenders. The basic truck is a 6×6 (three axles, six wheels, all of which are powered) heavy truck. Early M939s were rebuilds of M809 vehicle chassis with a new automatic transmission, transfer cases, cab, and hood. Suffix –A2 are new production with later model Cummins engine.