How to Use the Color Key Colors are used throughout Automatic Transmissions and Transaxles to help illustrate diff erent transmission and transaxle components. Color is also used to help clarify hydraulic fl ow diagrams. Th e following key shows what each color represents. Transmission and Transaxle Components Torque converter, gears, shaft s, and related components Holding members (bands, clutches, etc.) Hydraulic control components (valve body, oil pump, hydraulic valves, servos, accumulators, etc.) Electronic control components (sensors, solenoids, etc.) Case, housings, and oil pans General Illustrations Primary component or feature Secondary components or feature General components General components Hydraulic Flow Diagrams Th e color keys used for the hydraulic fl ow diagrams found in this textbook are indicated on the individual diagrams. Th e keys will vary from one diagram to another, depending on the transmis- sion or transaxle manufacturer. Th erefore, be sure to check the color key on each diagram before studying the illustration. 4 Automatic Transmissions and Transaxles