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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 685 (Automatic Transaxle - 4T45-E - Introduction (2 Of 2)) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, First Gear (With Electronic Range Select Mode) >> Forward Clutch Applies

Forward Clutch Applies

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Forward Clutch 

Drive fluid is orificed into the forward clutch fluid circuit. Forward clutch fluid pressure applies the forward clutch.

1-2 Shift Solenoid Valve 

In first gear, the PCM energizes the 1-2 shift solenoid valve and the 1-2 signal fluid pressure acts on the 1-2 shift valve.

1-2 Shift Valve 

The 1-2 signal fluid pressure keeps the 1-2 shift valve in the downshifted position against a spring force. Drive fluid is routed through the 1-2 shift valve.

A/T Fluid Pressure Manual Valve Position Switch (TFP Val. Position Sw.) Assembly 

Drive fluid is routed to the TFP Val. Position Sw. Assembly, which signals the PCM that the transmission is in the Overdrive range.

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