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  2. Driveline shunt - Wikipedia

    en.wikipedia.org/wiki/Driveline_shunt

    Driveline shunt occurs when a vehicle gives an abrupt jolt while coming on or off overrun or freewheel. It is caused when the gearbox or other transmission linkages do not immediately relay changes in engine output to changes in wheel speed. There is a very brief delay before the backlash is taken up in a sudden, abrupt manner.

  3. GM must face big class action over faulty transmissions - AOL

    www.aol.com/news/gm-must-face-big-class...

    Drivers said the vehicles shudder and shake in higher gears, and hesitate and lurch in lower gears, even after repair attempts. They also accused GM of telling dealers to provide assurance that ...

  4. Drivetrain - Wikipedia

    en.wikipedia.org/wiki/Drivetrain

    The powertrain consists of the prime mover (e.g. an internal combustion engine and/or one or more traction motors) and the drivetrain - all of the components that convert the prime mover's power into movement of the vehicle (e.g. the transmission, driveshafts, differential and axles); [4] [5] whereas the drivetrain does not include the power ...

  5. Load dump - Wikipedia

    en.wikipedia.org/wiki/Load_dump

    If the battery becomes disconnected while it is being charged the load on the alternator suddenly decreases. However, the vehicle's voltage regulator cannot quickly cause the field current to decrease sufficiently, so the alternator continues to generate a large current. This large current causes the voltage on the vehicle bus to increase ...

  6. GM 9T50 transmission - Wikipedia

    en.wikipedia.org/wiki/GM_9T50_transmission

    In December 2020, GM initiated a program to repair or replace 9T65 transmissions which were causing issues. Repairs were limited to external components only. [12] The program applied to vehicles that had less than 18,000 mi (29,000 km) and had been delivered within the past 18 months. [13]

  7. Hydramatic - Wikipedia

    en.wikipedia.org/wiki/Hydramatic

    The rear pump was an unregulated gear pump driven from the transmission output shaft, which meant it was capable of pressurizing the transmission if the vehicle was in motion. This feature made it possible to push-start a vehicle with a dead battery if the vehicle could be accelerated to at least 15–20 mph (24–32 km/h).

  8. Overdrive (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Overdrive_(mechanics)

    When it is switched on, an automatic transmission can shift into overdrive mode after a certain speed is reached (usually 70+ km/h [40-45 mph or more] depending on the load). When it is off, the automatic transmission shifting is limited to the lower gears. Overdrive should usually be selected when the average speed is above 70 km/h (40-45 mph).

  9. GM Roto Hydramatic transmission - Wikipedia

    en.wikipedia.org/.../GM_Roto_Hydramatic_transmission

    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 wide gap in the reduction ratio between first and second gears combined with the direct mechanical connection to the engine to create a shift that could be firm enough ...

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