Automatic transmission systems are complex, relying on mechanical, hydraulic, and electronic components that need to work in sync; failure in this synchronization can lead to significant issues. Symptoms of transmission problems include unusual noises, failure to shift, fluid leaks, and a check engine light, all of which should prompt immediate inspection by a mechanic to avoid costly repairs. Regular maintenance, particularly timely changes of transmission fluid, is crucial to ensure the longevity and proper functioning of the automatic transmission system.