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Home >> Isuzu >> 2007 >> Ascender 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Neutral - Engine Running >> Boost Valve

Boost Valve

WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Reverse input fluid pressure exhausts and line pressure returns to the normal operating range as in the Park and Overdrive positions.