2001 eclipse gt v6 transmission problem!!! plz help

i have a 2001 eclipse gt v6 with auto tranny. i had a 2003 stratus rt tranny put in. the only difference was the speed sensor and axel gear. so we changed them. the car drives but goes into limp mode all the time. always says solenoid a and b or solenoid d and c ... always some of them. so we swapped the solenoids and it still does the same thing.. can someone please help me. i have heard the tranny relay, the ecm, because there is no tranny computer and i heard it needs a relearn. if so how do i do it. plz help. [email protected] or on here