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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, 4-3 Downshift - Torque Converter Clutch Not Applied (Without Touch Activated Power) >> Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Transmission Fluid Pressure (TFP) Manual Valve Position Switch

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When the TCC is in the release position, TCC release fluid pressure is routed to the TFP manual valve position switch. This fluid pressure signals the PCM that the TCC is in the released position.