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  2. 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.

  3. 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.

  4. Shift blocking - Wikipedia

    en.wikipedia.org/wiki/Shift_blocking

    Shift blocking is a feature of automobile manual transmissions added to improve fuel economy ratings in the Corporate Average Fuel Economy (CAFE) system by preventing a driver from switching from first gear to second or third as would be done normally.

  5. Transmission control unit - Wikipedia

    en.wikipedia.org/wiki/Transmission_Control_Unit

    A transmission control unit (TCU), also known as a transmission control module (TCM), or a gearbox control unit (GCU), is a type of automotive ECU that is used to control electronic automatic transmissions. Similar systems are used in conjunction with various semi-automatic transmissions, purely for clutch automation and actuation.

  6. Variable force solenoid - Wikipedia

    en.wikipedia.org/wiki/Variable_force_solenoid

    A variable force solenoid (VFS) is an electro-hydraulic device that controls pressure proportionally or inversely proportionally to a signal (voltage or current) obtained from the on-board controller of a powertrain. A low flow VFS is used as a signal level devices for transmission line pressure control or application of clutches.

  7. AMC and Jeep transmissions - Wikipedia

    en.wikipedia.org/wiki/AMC_and_Jeep_transmissions

    AMC used several different 9XX transmission cases for different engines. 1980 up CJs and 1980 to early 1983 AMC Eagles with 4-cyl used a small block Chev pattern. The 1983 up used 60 degree V6 pattern for the 2.5 and 2.8 (outsourced from GM through 1986) engines.