Hydraulic control system for an automatic transmission

A hydraulic control system for a transmission of a motor vehicle, the hydraulic control system comprising:

• a pressure regulation subsystem in fluid communication with a pump, the pressure regulation subsystem comprising a combined main regulation and priority valve configured to provide pressurized hydraulic fluid;
• a second-priority hydraulic circuit in fluid communication with the pressure regulation subsystem, the second-priority hydraulic circuit including at least one of a cooling hydraulic subsystem, a lubrication hydraulic subsystem, and a torque converter control subsystem, the combined main regulation and priority valve being configured to pressurize line pressure in the hydraulic control system as a first priority, to pressurize the second-priority hydraulic circuit as a second priority, and to feed excess pressure to a decrease-pressure circuit as a third priority;
• a manual valve assembly in fluid communication with the pressure regulation subsystem, the manual valve assembly being moveable between at least a park position, a neutral position, a drive position, and a reverse position;
• a default disable valve assembly in fluid communication with the manual valve assembly;
• a default disable solenoid valve assembly in fluid communication with the default disable valve assembly, the default disable solenoid valve assembly being configured to enable the default disable valve assembly to enable a plurality of default modes of operation;
• a default select valve assembly in fluid communication with the default disable valve assembly, the default select valve assembly being configured to select between at least a portion of the plurality of default modes of operation;
• and
• a plurality of clutch regulation valve assemblies in fluid communication with the pressure regulation subsystem, the manual valve assembly, the default disable valve assembly, and the default select valve assembly, wherein the plurality of clutch regulation valve assemblies is configured to engage a plurality of torque-transmitting mechanisms.