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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Automatic Transaxle - 4T65-E - Overhaul) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, Fourth Gear - Torque Converter Clutch Applied (Without Touch Activated Power) >> Notes

Overdrive Range, Fourth Gear - Torque Converter Clutch Applied (Without Touch Activated Power): Notes

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The torque converter clutch applies during third or fourth gear operation after the powertrain control module (PCM) receives the appropriate input signals to energize the TCC control (PWM) solenoid. To apply the torque converter clutch, the following changes take place in the electrical and hydraulic systems:

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