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. Transmission solenoids are usually installed in a transmission valve body, transmission control unit, or transmission control module.

Types

 * Variable force solenoid
 * On-off solenoid
 * Pulse-width modulated solenoid
 * Low leak variable bleed solenoid

Manufacturers

 * American Axle
 * ZF
 * TREMEC
 * BorgWarner
 * Eaton
 * Bosch
 * Hilite Industries
 * Saturn Engineering and Electronics
 * TLX Technologies