Dodge Repair: TRANS STUCK IN LIMP MODE, dodge neon, neon 2

Question
I HAVE A 2002 DODGE NEON 2.0 WITH AUTOMATIC TRANSMISSION I AM CURRENTLY STUCK IN LIMP MODE WITH CODE P0755 NOT SURE WHAT TO CHECK NEXT TO TRY TO FIX IT CHANGED THE INPUT SENSOR JUST FOR THE HECK OF IT BUT DID NOT CHANGE ANY THING BACK IN JANUARY THE TRANS COOLER BROKE AND THINGS MIXED PRETTY GOOD BUT CHANGED RADIATOR AND FLUSHED SYSTEM CHANGED TRANS FLUID AND FILTER RAN FINE FOR 10 MONTHS MIGHT NOT HAVE ANY THING TO DO WITH CURRENT PROBLEM BUT YOU NEVER KNOW ANY IDEAS ON THINGS TO CHECK OR REPLACE WOULD BE GREAT ONLY HELP I AM GETTING HERE IS IT IS A TRANS CODE BETTER OFF LOOKING FOR A NEW CAR  CAR HAS ABOUT 85000 MILES ON IT

Answer
P0755-2/4 SOLENOID CIRCUIT

POSSIBLE CAUSES
RELATED RELAY DTC’S PRESENT
INTERMITTENT WIRING AND CONNECTORS
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
2/4 SOLENOID CONTROL CIRCUIT OPEN
2/4 SOLENOID CONTROL CIRCUIT SHORT TO GROUND
2/4 SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
2/4 SOLENOID
TCM - 2/4 SOLENOID