Parts of an Automatic Transmission Car

An automatic transmission car is a vehicle that uses an automatic transmission to shift gears. Automatic transmissions are designed to make driving easier and more convenient, as they eliminate the need for the driver to manually shift gears.

Major Components of an Automatic Transmission

1. Torque Converter: The torque converter is a fluid coupling that transfers power from the engine to the transmission. It allows the engine to run at a different speed than the transmission, which is necessary for smooth shifting.
2. Planetary Gearset: The planetary gearset is a set of gears that are arranged in a planetary configuration. The planetary gearset provides the different gear ratios that are needed for driving.
3. Shift Solenoids: Shift solenoids are used to control the flow of fluid through the transmission. They allow the transmission to shift gears automatically.
4. Valve Body: The valve body is a housing that contains the shift solenoids and other valves. It directs the flow of fluid through the transmission.
5. Governor: The governor is a device that measures the speed of the transmission output shaft. It sends a signal to the transmission control module (TCM), which uses this information to determine when to shift gears.
6. Transmission Control Module (TCM): The TCM is a computer that controls the operation of the transmission. It receives signals from the governor and other sensors, and uses this information to determine when and how to shift gears.

Other Components of an Automatic Transmission

In addition to the major components listed above, an automatic transmission also includes a number of other components, such as:

• Transmission Pan: The transmission pan is a metal pan that covers the bottom of the transmission. It contains the transmission fluid and helps to keep the transmission cool.
• Filter: The filter is a device that removes contaminants from the transmission fluid. It helps to keep the transmission fluid clean and free of debris.
• Cooler: The cooler is a device that helps to cool the transmission fluid. It is typically located in front of the radiator.
• Driveshaft: The driveshaft is a metal shaft that connects the transmission to the rear wheels. It transmits power from the transmission to the wheels.
• Differential: The differential is a device that allows the rear wheels to turn at different speeds. This is necessary when the car is turning.
• Axles: The axles are metal shafts that connect the differential to the wheels. They transmit power from the differential to the wheels.

Conclusion

Automatic transmissions are complex devices that play a vital role in the operation of a car. By understanding the different parts of an automatic transmission, you can better understand how your car works and how to maintain it properly.