Auto Trans Control Solenoid

Keep automatic transmission problems at bay with a new transmission shift solenoid from autozone.

Auto trans control solenoid. Transmission fluid acts as a lubricant for the moving parts inside of the transmission and keeps things running smoothly. A bad solenoid cannot effectively control the flow of transmission fluid causing delays and unexpected friction or disconnection between the shift gears. Newer designs require multiple pressure control solenoids sometimes permitting the solenoids to apply exact pressure controls. This article explains the working and functioning of a modern day transmission control solenoid.

As you drive the car s computer determines which gear is optimal for your speed. They control the flow of transmission fluid throughout the transmission and they open and close as per the electrical signals they receive from your vehicle s engine or transmission control unit which pulls its data from a series of speed sensors in the engine. Inside the solenoid there s a plunger surrounded by a magnetic coil. The transmission control module tcm the brains of the transmission will send power to one of the shift solenoids in order to shift gears.

Failure in the solenoid directly affects the running of the vehicle. A typical automatic transmission uses a number of different solenoids for different purposes. If one or more solenoids are bad you may lose the use of one or more gears and may even be stuck in one particular gear or unable to shift into any gear at all. Modern automatic transmissions are basically designed with pressurized hydraulic fluid to adjust gears.

Solenoids are electro hydraulic valves. Transmission control solenoids include a valve controlled by the ecm or tcm that regulates how. Do not confuse a slipping transmission with a solenoid problem. When one of those electro mechanical valves go wrong then all types of transmission issues can.

A transmission solenoid is an electro mechanical component valve used to control the flow of transmission fluid in the transmission. What does the shift solenoid do. Each time a change of the gear is required the computer of a vehicle will activate a transmission solenoid which helps to direct transmission fluid to the valve body to involve the proper gear. Older designs for automatic transmissions just use one line with a pressure control solenoid adjusting pressure throughout the whole transmission.

Automatic transmission control solenoids are used to help regulate the flow of transmission fluid throughout the transmission. In a lot of automatic transmissions you can replace the solenoid or so called the whole solenoid pack. It s recommended to measure the solenoid with a multimeter from the transmission control unit connector to check if there are any open circuits take help of a wiring diagram.