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2. Citroën DS - Wikipedia

   en.wikipedia.org/wiki/Citroën_DS

   This was a four-speed gearbox and clutch, operated by a hydraulic controller. To change gears, the driver flicked a lever behind the steering wheel to the next position and eased-up on the accelerator pedal. The hydraulic controller disengaged the clutch, disengaged the previous gear, then engaged the nominated gear, and re-engaged the clutch.

3. Ultramatic - Wikipedia

   en.wikipedia.org/wiki/Ultramatic

   The first Ultramatic Drive was a hydraulic torque converter automatic transmission with a two-speed plus reverse epicyclic geartrain, with torque converter lockup, called "Direct Drive" by Packard. The unit was fully hydraulically controlled with a "valve body," like most early automatic transmissions before the advent of electronic control.

4. Turboglide - Wikipedia

   en.wikipedia.org/wiki/Turboglide

   The basis of the Turboglide's unique abilities was its five-element torque converter.Most automatic transmissions have a three-element torque converter, consisting of an impeller (an engine-driven pump); a turbine that rotates with the flywheel; a transmission-driven turbine that receives the energy of the oil propelled by the impeller, and a stator that redirects the recirculating oil so that ...

5. Powerglide - Wikipedia

   en.wikipedia.org/wiki/Powerglide

   In the first few years after introduction, they became known as the "Slip-N-Slide Powerglide", due to the fluid coupling, as opposed to the mechanical coupling of a clutch-driven gearbox, and the "Positive-Pop transmission". This last is due to the characteristic "bump" or "pop" which occurs as the transmission is put into gear from neutral.

6. Hydramatic - Wikipedia

   en.wikipedia.org/wiki/Hydramatic

   Roto Hydramatic 240; a three-speed, four-range automatic has ratios of 3.64:1, 3.03:1, 1.57:1, and 1.00:1 The Hydramatic was fitted with two pumps to pressurize its hydraulic control system and provide lubrication of internal components. The front pump was a variable displacement vane unit driven from the fluid coupling housing, which meant oil ...

7. Nash Metropolitan - Wikipedia

   en.wikipedia.org/wiki/Nash_Metropolitan

   Other modifications included a new gearbox and hydraulic actuation for the clutch (Series I models used a mechanical clutch linkage). The change to a new engine and gearbox added 50 lb (23 kg) to the weight. This model is referred to as Series II or NK2 (Commencing with Vehicle identification number (VIN) E11001 on 19 August 1954).

8. Hydropneumatic suspension - Wikipedia

   en.wikipedia.org/wiki/Hydropneumatic_suspension

   1954 Traction Avant 15H: Rear suspension, using LHS hydraulic fluid. 1955 Citroën DS: Suspension, power steering, brakes and gearbox/clutch assembly powered by high pressure hydraulic assistance. A belt driven 7-piston pump, similar in size to a power steering pump, generates this pressure when the engine is running.

9. Mercedes-Benz W180 - Wikipedia

   en.wikipedia.org/wiki/Mercedes-Benz_W180

   Many cars have subsequently been converted to use a regular manual clutch, due to the high maintenance costs of continuing to use the Hydrak clutch. Also introduced with the 220 S was the W105 219 , which from the a-pillar forward was essentially a single-carburetor 220 a, but rearward from the a-pillar it used the shorter body of the W120/W121 ...