3 - 2 Downshift - Valves In Second Gear Position

General Description
In order to obtain the 4-3 downshift, the PCM receives an input signal from the TP Sensor at increased throttle openings. This causes the PCM to de-energize the 1-2 solenoid.

1-2 Shift Solenoid (1-2 SS) Valve: When the 1-2 SS Valve de-energizes, spring force holds the 1-2 shift valve to the extreme right.

2-3 Shift Solenoid (2-3 SS) Valve: When the 2-3 SS Valve de-energizes, signal B pressure exhausts at the solenoid. This allows a spring force to move the 2-3 shift valve to the extreme right.

2-3 Shift Valve: The third clutch feed pressure from the 2-3 shift valve is shut off and an exhaust port is opened at the 2-3 shift valve. This exhausts the third clutch fluid as the fluid leaves the third clutch : accumulator. This causes the direct clutch to release,-shifting the transmission into second gear.

Direct Clutch: Exhausting third clutch fluid unseats the #8 checkball. This allows for a rapid exhausting of the third clutch apply fluid at the 2-3 shift valve.

Third Clutch Accumulator: As fluid exhausts from the third clutch accumulator, fluid also exhausts through the unseated #8 check valve and exhausts at the 2-3 shift valve.