[Animation of the operation of an automatic transmission with a torque converter](https://www.youtube.com/watch?v=w-ng_6nXY5s)
Torque converter
* It is a device that transfers power from the engine to the gearbox.
* Consists of three main components: pump, turbine and stator.
* The pump connects to the engine and creates a fluid flow.
* The turbine is connected to the gearbox and receives fluid flow from the pump.
* The stator is located between the pump and the turbine and directs the flow of fluid to increase torque.
Operating principle
1. Starting the engine: When the engine starts, the pump begins to rotate, creating a flow of fluid.
2. Power transmission: The fluid flow from the pump rushes to the turbine, causing it to rotate.
3. Torque Multiplication: The stator directs fluid to the turbine at an angle, which increases the torque transmitted to the gearbox.
4. Lockup: At speeds above a certain threshold, the torque converter locks up, directly connecting the pump and turbine to improve efficiency.
5. Changing Gear Ratio: The transmission changes gears by changing the relationship between engine speed and vehicle speed.