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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 >> Manual Second Gear >> Notes

Manual Second Gear: Notes

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When the gear selector lever is moved to the Manual Second (D2) gear range, the manual valve moves and allows line pressure to enter the D21 fluid passage. The transmission reacts by shifting immediately into second gear range. The transmission is prevented from upshifting into either Third or Fourth gear.

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