With more pertinent content than any other one-volume book on the subject, TechOne: Automatic Transmissions helps readers understand transmissions and related systems to facilitate effective diagnosis and service of automobiles. All NATEF tasks in the area of Automatic Transmissions are covered in easy-to-digest portions, allowing readers to master the basics before moving into more technical concepts. Engaging graphics augment the lesson-sized chapters that examine transmission gears, hydraulics, electrical theories, technician duties, safety, tools of the trade, and more. The end result is a comprehensive book that will allow readers to become more proficient in theory, diagnosis, service, and repair of automatic transmissions.