Hydraulic control system for an automatic transmission with electronic transmission range selection

A hydraulic control system for a motor vehicle automatic transmission having an electronic transmission range selector comprising, in combination,

• a variable displacement hydraulic pump having a fluid output,
• a regulator valve for adjusting said fluid output of said pump,
• a torque converter having a lock up clutch,
• a torque converter regulator valve receiving said fluid output of said pump and providing controlled fluid flow to said lock up clutch of said torque converter,
• a plurality of torque transmitting devices having hydraulic actuators receiving fluid outputs from regulator valves controlled by variable force solenoids,
• an electronic transmission range selector control valve having a control port,
• a default disable control valve having a control port,
• a drive select control valve having a control port,
• a two position default disable solenoid valve having an output selectively provided to said control ports of said electronic transmission range selector control valve, said default disable control valve and said a drive select control valve, and
• a park servo having an output coupled to a park mechanism of said automatic transmission and fluid ports communicating with fluid ports of said electronic transmission range selector control valve.