Shift Solenoid Valve - Mode B
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.
Exhausting 4th clutch/B cooling feed fluid pressure is routed to the shift solenoid valve - mode B, where it passes through the valve into the VL 12 reverse/4th clutch feed circuit.