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Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - 4T65-E - Description And Operation) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, Fourth Gear - Torque Converter Clutch Applied >> Number 1 Ball Check Valve (372)

Number 1 Ball Check Valve (372)

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Located in the case cover (400), blocks TCC release fluid while sending TCC apply fluid to the torque converter clutch blow-off valve (417-20).