@bfrosh001: Key Components: • **TCU / ECU:** The electronic brain that manages gear shifts and communicates with the engine. • **Sensors:** Devices like input and output speed sensors and transmission range sensors that monitor vehicle performance in real time. • **Solenoids:** Electromechanical valves that control fluid flow and pressure to engage the correct gears. • **Power Supply:** The 12V battery and fuses that supply steady electrical power to the system. I'd love to help out if you have any questions: • Are you trying to diagnose a specific problem, like harsh shifting or a check engine light? • Do you need help with a particular sensor or solenoid?