Automatic transmission solenoids are responsible for shifting gears by controlling the flow of transmission fluid in the valve body.
Below is a list of automatic transmission solenoids and their functions:
* Shift Solenoid (SSV): Controls gear shifting between two or more gears.
* Torque Converter Lockup Solenoid (TCC): Closes the torque converter, providing a direct connection between the engine and transmission in certain gears.
* Clutch Pack Engage Solenoid: Activates the clutch packs that connect the various gears in the transmission.
* Clutch pack release solenoid: Disengages the clutch packs, disengaging the gears.
* Pressure Control Solenoid (PCS): Regulates transmission fluid pressure in the valve body to alter shift parameters and shift quality.
* Smooth Shift Solenoid (SSC): Smoothes gear changes, reducing the felt shock during gear changes.
* Shift Timing Solenoid (TSS): Coordinates gear shifts between multiple solenoids, providing smooth and efficient shifting.
The suitability of specific solenoids for specific automatic transmission speeds varies depending on the transmission type and vehicle model. Typically, however, the shift solenoid is responsible for shifting between the initial gears (usually 1-3), while the other solenoids are responsible for shifting into higher gears (such as 4 and above).