Since modern automatic transmissions are generally seamless, any noticeable symptoms are important warnings that should prompt an immediate diagnosis.

GM has released a new recall for units of the Chevy Tahoe and Chevy Suburban over an issue that may result in transmission valve failure and rear wheel lock-up.

If you're a control freak, late-model electronic transmissions are just what you need to modernize your classic car, and if you decide to go that route, a transmission control module is a must-have.