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Cadillac, under Thompson, began working on a 'shiftless' transmission in 1932, and a new department within Cadillac Engineering was created, headed by Thompson and including engineers Ernest Seaholm, Ed Cole, Owen Nacker, and Oliver Kelley. During 1934, the Cadillac transmission group had developed a step-ratio gearbox that would shift ...
In 1933, Thompson began working on the development of an automatically shifting transmission. The following year, Thompson was transferred from Cadillac to the General Motors Corporation Engineering Department when GM management reassigned the automatic transmission project there to protect it, fearing that the Cadillac brand might not survive ...
The clutch pedal controls the pressure plate (clutch engaged – the clutch pedal is not being pressed) or not connected to the engine (clutch disengaged – the clutch pedal is being pressed down). When the engine is running and the clutch is engaged (i.e., clutch pedal up), the flywheel spins the clutch pressure plate and hence the transmission.
Shift pattern (2) 2 on/off solenoids Shift quality 6 Variable Force Solenoids · 1 for each clutch · 1 for TCC Torque converter clutch Variable Force Solenoid ECCC · 2 path · turbine damper Converter size 238 mm (9.37 in) 258 mm (10.16 in) Fluid type DEXRON High Performance ATF Fluid capacity 10.8 L (11.4 US qt) [a] 10.3 L (10.9 US qt) [b]
The shift from 1st to 2nd or 2nd to 3rd range was long and drawn-out, ending with a harsh shift. The reason for this was that three things were happening. Not only was the transmission shifting to a very much higher range ( 2.93 to 1.56, but it was also simultaneously emptying the fluid coupling and making a mechanical lock-up.
The Si’s crisp-shifting six-speed manual is a joy to use and features rev-matching that works well. Thanks to the limited-slip differential, this front driver can put all of its 200 horsepower ...
The clutch brake not only slows or stops the idle gear axis but can also prevent shifting into gear until the clutch pedal is released a few centimetres (or inches) off the floor. In order to shift into gear, the clutch must be halfway off the floor, otherwise, the clutch brake will prevent the transmission from being shifted into or out of gear.
Image source: The Motley Fool. General Motors (NYSE: GM) Q4 2024 Earnings Call Jan 28, 2025, 8:30 a.m. ET. Contents: Prepared Remarks. Questions and Answers. Call ...