LEMON Manuals: Even more car manuals for everyone
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, 4-3 Downshift >> Notes

Overdrive Range, 4-3 Downshift: Notes

WARNING: This page is about a different variant/trim than selected.

When the transmission is operating in Fourth gear, a 4-3 downshift occurs if there is a significant change or increase in the throttle position, or if the load on the engine is increased. The torque converter clutch releases prior to the downshift occurring, which results in the following changes in the hydraulic system:

scientia non olet · About LEMON Manuals