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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2)) >> Description and Operation >> Manual Second Gear >> Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly

Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

The D2 fluid is routed to the TFP manual valve position switch where it opens the normally closed D2 fluid pressure switch. With the D2 and the D3 pressure switches closed and the D4 pressure switch open, the TFP manual valve position switch signals the PCM that the transmission is operating in manual second.

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