This course is one of several subcourses that make up the entire Army correspondence course on wheeled vehicle maintenance. The subcourse is designed to provide the student with information about the operation, malfunction diagnosis, maintenance, and repair of wheeled vehicle clutches, transmissions, and transfer cases. It provides the basic theory, and also includes on-the-job task assignments. The subcourse is divided into six lessions covering the following topics: fundamentals of gears; wheeled vehicle clutches; fundamentals of conventional transmissions and power takeoffs; maintenace of conventional transmissions and power takeoffs; wheeled vehicle automatic transmissions; and transfer cases. Each lesson contains objectives, text, task assignments, and review exercises. Answers for the exercises are provided after the final lesson, along with an examination and application task test. This subcourse is designed for student self-study, but could be used in small group learning situations. (KC)