Pressure Regulation
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
VFS Clutch Control Solenoid D
Drive\reverse solenoid signal (25) fluid pressure is ramped down by the VFS clutch control solenoid D duty cycle, decreasing drive\reverse solenoid signal (25) fluid pressure.
Clutch Regulator Valve
When drive\reverse solenoid signal (25) fluid pressure decreases, fluid is routed thru orifice #40 to the clutch regulator valve and opposes valve spring force, allowing drive\reverse regulator (19) fluid into the drive\reverse feed (21) fluid circuit.