Drive Range - Fourth Gear: Notes
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
As vehicle speed increases, the TCM processes input signals from the output speed sensor, the TP sensor and other vehicle sensors to determine the precise moment to command ON the normally high pressure control solenoid 3 trim to regulate 4th clutch apply. At the same time, the normally low pressure control solenoid 4 trim is commanded OFF and the transmission shifts into Fourth gear.