![]() ![]() Acting against the force of the spring, the plunger controls the opening and closing of the orifice. The orifice is the connection point between the inlet and outlet ports through which the transmission fluid flows. The coil and core take the form of a hollow cylinder in the interior of which resides a plunger. The coil is enameled wire around a conductive material such as steel or iron. ![]() The body is made of steel with a metallic finish, and is hollow inside. It consists of nine parts: the valve body, an inlet port, an outlet port, the solenoid coil body, coil winding, lead wires, a plunger or piston, a spring, and an orifice. The Automatic Transmission Solenoid controls the flow of transmission fluid into and through the automatic transmission. Usually the most frustrating thing about restoring a vehicle is hunting down a top-rated source for reliable parts. On occasion you have to get an solenoid for road safety or performance concerns, and sometimes it's an item for fun regardless, acquire the highest level of reliability you can afford. While most transmissions in modern vehicles only use one or two solenoids, a maximum of four solenoids can be used. The solenoids can be found on the transmission valve body and are contained within an assembly that also contains the electrical apparatus required to switch them on and off. It is in direct communication with the transmission computer which is a subsystem of the vehicle control computer and allows for precise control of fluid flow. The switch that controls the valve is called an automatic transmission solenoid. When sensors in the transmission detect the right series of movements, a small electric valve opens to allow the transmission fluid to transfer between compartments. ![]() Transmission fluid is transferred from one compartment of the transmission to another, engaging and disengaging the gear sets. Replacement Automatic Transmission Solenoid InformationĬhoose from top brands including: Standard Motor Products Genuine Mopar ATP Original Equipment ZF Dorman Pioneer Cables Delphi AC Delco Vemo API DensoĪn automatic transmission is a complex mechanical device that uses variability of fluid pressure to know when it should switch to higher or lower gears. ![]()
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