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