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  2. GM 4L60-E transmission - Wikipedia

    en.wikipedia.org/wiki/GM_4L60-E_transmission

    By activating and deactivating the solenoids in a predetermined pattern by the PCM, 4 distinct gear ratios can be achieved. The last 4L60Es were only used in the GM Vans in 2013, before being replaced by the 6L80E. The shift solenoid pattern, also sometimes referred to as solenoid firing order, is as follows; Shift Solenoid Pattern

  3. Transmission solenoid - Wikipedia

    en.wikipedia.org/wiki/Transmission_solenoid

    A transmission solenoid or cylinoid is an electro-hydraulic valve that controls fluid flow into and throughout an automatic transmission. Solenoids can be normally open or normally closed. They operate via a voltage or current supplied by the transmission computer or controller.

  4. Transmission control unit - Wikipedia

    en.wikipedia.org/wiki/Transmission_Control_Unit

    Newer automatic transmission designs often use many pressure control solenoids, and sometimes allow the shift solenoids themselves to provide precise pressure control during shifts by ramping the solenoid on and off. The shift pressure affects the shift quality (too high a pressure will result in rough shifting; too low a pressure will cause ...

  5. Automatic transmission - Wikipedia

    en.wikipedia.org/wiki/Automatic_transmission

    Most systems use solenoids which are controlled by either the engine control unit, or a separate transmission control unit. This allows for more precise control of shift points, shift quality, lower shift times and manual control. The first five-speed automatic was the ZF 5HP18 transmission, debuting in 1991 on various BMW models.

  6. Ford AXOD transmission - Wikipedia

    en.wikipedia.org/wiki/Ford_AXOD_transmission

    This can become quite violent. Reasons for this part's failure: Piston stuck, or seals or springs damaged or missing. Correction for this problem: Check these parts for damage. Replace as required (located inside the transaxle, recommended that a transmission shop do the repair, but a full rebuild of the transaxle is NOT required).

  7. Turbo-Hydramatic 125 - Wikipedia

    en.wikipedia.org/wiki/Turbo-Hydramatic_125

    This was a later model of the 125 that debuted for 1982 and included a torque converter clutch or TCC. The TCC acts similar to a clutch in a manual transmission vehicle, in that at speeds above 35 MPH a combination of engine vacuum- and temperature-sensing valves, and a dedicated brake switch - and in later models an ECU - activated a solenoid which engaged a clutch physically locking the ...

  8. GM 8L transmission - Wikipedia

    en.wikipedia.org/wiki/GM_8L_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]

  9. Teletouch - Wikipedia

    en.wikipedia.org/wiki/Teletouch

    Pushing a button on the shift control preselected the chosen gear. The electrical circuit was closed only after the driver fully depressed the clutch pedal. This energized the appropriate transmission mounted solenoids necessary for returning the transmission to neutral and then completing engagement of the preselected gear.

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