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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description And Operation >> Automatic Transmission Hydraulic Diagrams >> Manual First Gear >> 1-2 Upshift Checkball (#8)

1-2 Upshift Checkball (#8)

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Exhausting the 2nd clutch fluid pressure unseats the ball and is routed through the 2nd fluid circuit.