Transmission work? Yes we do it and we will explain it.
An automatic transmission is a very complex piece of machinery. It is comprised of many things, the Torque Convertor, Clutches, Bands, Servos, Planetary Gear Sets, Bushings, Bearings, Seals, Gaskets, Sealing Rings along with the electrical components in the newer Automatic transmissions. It all starts with the torque converter, a large doughnut shaped clutch, inside the bell housing. The converter is actually a pump and turbine mechanism assembled together with a series of passages designed to create a strong centrifugal force using the oil going through them.
How the Transmission Works...Once you start the engine, the torque converter begins to turn at engine speed and waits for you to shift gears. When you go from Park to Drive, the converter turbine uses a shaft to engage a series of gear sets located inside their own drum cases. These gear sets are called planetary gearsets because their varied size gears mesh together in a planetary system-like configuration to rotate and provide different torque speeds. A series of clutch disks pressed together somewhere around the middle of the transmission, depending on design, provide a mechanism to engage one or more gearsets together. At the same time, bands around the gearset drums help to stop and free those same gears to give you a smooth transition from low to higher speeds and vice versa. As you travel down the road at different speeds, stopping and merging with traffic, hundreds of commands travel to different parts of the transmission. These commands come from the valve body. This is the command center of the transmission hydraulic system. When you step on the accelerator, a valve called the governor in the valve body, with the help of other valves, sensors and oil pressure, actuates gears, clutches and bands to increase, decrease or maintain speed. The valve body also provides a mechanism to let you engage different speed ranges manually (1, 2 or D) and change direction to pull out of a parking spot (R). Through the years, the automatic transmission has become more sophisticated with the introduction of electronic computer control. But its goal remains the same: transmit your speed desire to the wheels to take you to where you need to go to make your - - - Transmission Work.