What symptoms if the matic transmission is already faillure?

If a automatic transmission is failing, common symptoms include slipping gears, where the transmission unexpectedly changes gears or loses power; strange noises, such as grinding or whining sounds; delayed or rough shifting, where there is a noticeable lag between pressing the accelerator and the car responding; and fluid leaks, which may indicate internal damage. Additionally, a warning light on the dashboard may illuminate, signaling issues with the transmission system.