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Home >> Chevrolet >> 2007 >> Avalanche 5.3 3 >> Repair and Diagnosis >> External Pages >> Different car >> Section 893 (Automatic Transmission - 6L50/6L80/6L90 - Introduction (2 Of 2)) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Drive Range, First Gear >> Low & Reverse Clutch Releases >> #4 Ball Check Valve

#4 Ball Check Valve

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

PS5 fluid pressure seats the #4 ball check valve against the 456 clutch fluid circuit. PS5 fluid is then directed into the CSV2 latch fluid circuit and routed to the clutch select valve 2. CSV2 latch fluid combines with clutch select valve 2 spring force and holds the valve in this position during all 6 forward gear ranges.

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