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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)) >> Specifications >> Transmission Internal Mode Switch Logic

Transmission Internal Mode Switch Logic

WARNING: This page is about a different variant/trim than selected.
Transmission Internal Mode Switch Logic

Gear Selector Position A B C P
Park LOW HI HI LOW
Park/Reverse LOW LOW HI LOW
Reverse LOW LOW HI HI
Reverse/Neutral HI LOW HI HI
Neutral HI LOW HI LOW
Neutral/Drive 4 HI LOW LOW LOW
Drive 4 HI LOW LOW HI
Drive 4/Drive 3 LOW LOW LOW HI
Drive 3 LOW LOW LOW LOW
Drive 3/Drive 2 LOW HI LOW LOW
Drive 2 LOW HI LOW HI
Drive 2/Drive 1 HI HI LOW HI
Drive 1 HI HI LOW LOW
Invalid HI HI HI HI
LOW HI HI HI
HI HI HI LOW
  • HI = Ignition voltage
  • LOW = 0 voltage