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Home >> Cadillac >> 2007 >> Escalade ESV >> Repair and Diagnosis >> External Pages >> Different car >> Section 969 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description And Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, First Gear >> 1-2 Shift Valve

1-2 Shift Valve

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Signal A fluid pressure holds the valve in the downshifted position against spring force. In the First gear position, the valve blocks D4 fluid from entering the 2nd fluid circuit.