Drive Range - Fourth Gear: Notes
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. 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 input and output speed sensors, 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.