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2. GM 4L60-E transmission - Wikipedia

   en.wikipedia.org/wiki/GM_4L60-E_transmission

   The police package (9C1) B-body cars featured a First Gear Block Out (FGBO) Plate on the transmission housing to prevent drivetrain damage. The shift point for first to second gear is about 43 MPH (69 km/h) while second to third gear shift point is about 83 MPH (134 km/h) assuming a 3.08:1 differential and a 5,500 RPM engine speed limit.

3. List of GM transmissions - Wikipedia

   en.wikipedia.org/wiki/List_of_GM_transmissions

   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. Throughout the 1950s, all GM Marques continued developing automatic transmission designs, both jointly and ...

4. Turbo-Hydramatic - Wikipedia

   en.wikipedia.org/wiki/Turbo-Hydramatic

   For the 1981 model year, a lock-up torque converter was introduced which coincided with the new EMC control of most GM cars; this version is the THM350-C, which was phased out in 1984 in GM passenger cars for the 700R4. Chevrolet/GMC trucks and vans used the THM350-C until 1986. The lock-up torque converter was unpopular with transmission builders.

5. Hydramatic - Wikipedia

   en.wikipedia.org/wiki/Hydramatic

   The Automatic Safety Transmission (AST) was a tangent outgrowth of this work. The AST was a semi-automatic transmission using planetary gears and conventional friction clutch, requiring the driver to use the clutch to shift into or out of gear, but not between the two forward gears. Oldsmobile offered the AST from 1937 to 1939, while Buick ...

6. Gear stick - Wikipedia

   en.wikipedia.org/wiki/Gear_stick

   Steering wheel with column-mounted gear lever in a W 120-series Mercedes-Benz 180 Column shifter for an automatic transmission in a Ford Crown Victoria. Gear sticks are most commonly found between the front seats of the vehicle, either on the center console (sometimes even quite far up on the dashboard), the transmission tunnel (erroneously called a console shifter when the floor shifter ...

7. Semi-automatic transmission - Wikipedia

   en.wikipedia.org/wiki/Semi-automatic_transmission

   [43] [44] [45] The Automatic Safety Transmission was replaced by the fully-automatic Hydra-Matic for the 1940 model year. [46] [47] The 1938–1939 Buick Special was available with another Self-Shifter 4-speed semi-automatic transmission, [48] [49] [50] which used a manual clutch for starting from standstill and an automated clutch for gear ...