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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 >> Overdrive Range, First Gear >> Notes

Overdrive Range, First Gear: Notes

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When the gear selector lever is moved to Overdrive Range D, the manual valve moves and allows line pressure to fill the drive fluid circuit. Changes to the hydraulic and the electrical systems in the transmission are as follows:

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