What are the symptoms of a faulty automatic transmission?

[KadenAnn]

Automatic transmission failure symptoms include: inability to engage gears or abnormal noises when starting in gear. An automatic transmission is a gear-shifting device that automatically changes gears based on vehicle speed and engine RPM, as opposed to manual transmissions. It primarily consists of four types: hydraulic automatic transmissions, continuously variable transmissions (CVT), electronically controlled mechanical automatic transmissions, and dual-clutch transmissions. The core function of an automatic transmission is to achieve automatic gear shifting, which means that while driving, the driver operates the accelerator pedal as needed, and the automatic transmission can automatically shift into different gears based on engine load and the vehicle's operating conditions.