Part Throttle Detent Downshift

At vehicle speeds of 64-88 km/h (40-55 mph) in Fourth gear, quickly increase the throttle angle. Verify the following results:
- The Torque Converter Clutch (TCC) releases.
- The transmission downshifts to 3rd gear immediately.
- The 1-2 Shift Solenoid valve turns OFF.
- The 2-3 Shift Solenoid valve remains ON.