BAD TRANSMISSION Solenoids then call JUNK CAR BUYER AUSTIN 512-789-2177
SOLENOIDS are pretty much just tightly wound metal coils. They're used in all sorts of machines, there are many in cars used for many different things including the starter. The starter solenoid receives two currents, a large electric current from the car battery and a small electric current from the ignition switch. When the key is turned to start the car the small electric current forces the starter solenoid to close a pair of heavy contacts and that relays the large current to the starter motor. Manual transmissions use the clutch to change gears but automatic transmissions use a complicated hydraulic system, and the transmission solenoids are essential for this process.
There are many solenoids in the transmission with many different jobs such as the transmission shift solenoid, lockup solenoid, or transmission control solenoid. They open or close hydraulic valves and regulate fluid flow depending on the speed. The speed sensors around the engine activate the solenoids to increase or decease the fluid flow and in turn the speed