Fluid Pressure Directed in Preparation for a Shift

Manual Valve 

With the manual valve in the reverse position, line pressure is directed into the reverse fluid circuit to the #2 ball check valve and clutch select valve 3.

#2 Ball Check Valve 

Reverse fluid seats the #2 ball check valve against the Solenoid 1 fluid passage and fluid is forced through orifice #15 into the CSV 2 enable circuit.

Clutch Select Valve 2 

CSV 2 enable fluid, present at the valve from Park position, continues to hold the clutch select valve 2 against clutch select valve 2 spring force.