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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transaxle - 4T80-E - Introduction (2 Of 2)) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Park - Engine Running >> Notes

Park - Engine Running: Notes

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When the gear selector lever is in the Park (P) position and the engine is running, fluid is drawn into the scavenger pump from the bottom pan and routed into the side cover. From the side cover, fluid is drawn through the main filter into the primary and secondary oil pump assemblies. Line pressures from the primary and secondary oil pump assemblies are then directed to the following control devices:

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