Overdrive Range - Third Gear (Converter Clutch Applied)

Overdrive Range - Third Gear (Converter Clutch Applied):

OVERDRIVE RANGE - THIRD GEAR (CONVERTER CLUTCH APPLIED)

SOLENOID "A" - OFF
SECOND CLUTCH - APPLIED
1/2 SUPPORT ROLLER CLUTCH - OVERRUNNING
SOLENOID "B" - OFF
THIRD CLUTCH - APPLIED
FORWARD BAND - APPLIED
TCC SOLENOID - ON
THIRD ROLLER CLUTCH - HOLDING

The [1][2]torque converter clutch applies during third gear operation after the PCM receives appropriate input signals from the Vehicle Speed Sensor (VSS), Throttle Position Sensor (TPS) and engine temperature sensor. When the proper vehicle operating conditions have been met, the "on/off" converter clutch solenoid (315) is "energized". Torque Converter Clutch (TCC) signal fluid at the converter clutch solenoid (315) no longer exhausts and moves the converter clutch valve (335) against line pressure and spring force. With the valve in this position, the following occurs:
^ release fluid from the converter clutch plate is allowed to exhaust
^ converter feed pressure passes through the valve, enters the TCC accumulator passage and is sent to the TCC accumulator piston (416) and the converter clutch regulator valve (330)
^ regulated apply fluid, from the converter clutch regulator valve (330), enters the apply passage

Apply fluid seats the #1 checkball (372) against release fluid and applies the converter clutch. Apply fluid is also at the torque converter blow off valve (417-20) to exhaust excess fluid pressure. Converter feed fluid at the converter clutch valve (335) is allowed to feed into the cooler passage where it passes through the cooler check valve (28), through the cooler and into the lube system of the transaxle.

TCC Accumulator Assembly (413-416): Absorbs converter feed fluid through the TCC accumulator passage and uses spring force to provide an increasing TCC accumulator bias pressure for the converter clutch regulator valve (330) during the apply of the [1][2]torque converter clutch plate.

Converter Clutch Regulator Valve (330): Biased by modulator and TCC accumulator pressure, it uses converter feed pressure to provide regulated apply fluid to the converter clutch valve (335).

Converter Clutch Solenoid (315): When energized, TCC signal fluid shifts the converter clutch valve (335) against line pressure and spring force.

Converter Clutch Valve (335): When shifted, release fluid from the [1][2]torque converter clutch exhausts. Converter feed fluid enters into the TCC accumulator passage to stroke the TCC accumulator piston (416) and also feeds into the cooler passage. Regulated apply fluid from the converter clutch regulator valve (330) can now enter the apply passage to the torque converter.

#1 Checkball (372): Located in the channel plate (400), blocks release fluid while sending apply fluid to the [1][2]torque converter clutch blow off valve (417-20).

Cooler Check Valve (28): Allows cooler fluid to pass through the cooler and provide lubrication for the transaxle. It also prevents converter drain back when the engine is off.