Overdrive Range, 4-3 Downshift - Torque Converter Clutch Not Applied (With Touch Activated Power): Notes

When the transmission is operating in Fourth gear, a 4-3 downshift will occur if there is a significant change (increase) in the throttle position or if the load on the engine is increased. When the 4-3 downshift occurs, the torque converter clutch will release prior to the shift occurring which results in the following changes in the hydraulic system: