GM Service Manual Online
For 1990-2009 cars only

For information on the following power flows through the following range selections, including mechanical power flows and hydraulic descriptions, refer to Power Flows in the Hydra-Matic 4/5L40-E Technician's Guide.

Important: The range descriptions listed below each contain a simplified hydraulic circuit to show what hydraulic action occurs for that specific range. For the complete hydraulic circuit for each range, including active fluid passages, refer to Complete Hydraulic Circuits in the Hydra-Matic 4/5L40-E Technician's Guide.

    • Park (engine running)
    • Reverse
    • Overdrive range, first gear (before first 1-2 shift)
    • Overdrive range, first gear (after first 1-2 shift)
    • Overdrive range, second gear
    • Overdrive range, third gear
    • Overdrive range, fourth gear
    • Overdrive range, fifth gear (torque converter clutch released)
    • Overdrive range, fifth gear (torque converter clutch released to applied)
    • Manual fourth gear (from overdrive range - fifth gear)
    • Manual third gear (from manual fourth - fourth gear)
    • Manual second gear (from manual third - third gear)
    • Manual second - first gear (from manual second - second gear)