I cannot get my car out of limp mode and I’ve changed everything I know to..

What is your question?

I swapped motor and transmission from a 2006 dodge magnum. 5.7 hemi. Nag1 transmission. I also changed out all the sound audio in the car while the motor was out. After putting it all back together, the car was in limp mode and has been every since. I’ve changed tons of parts including, pcm, whole rear end, abs wheel speed sensors, tone rings, map sensor, transmission shift solenoids… still no luck.. idk what it could be. I’m leaning towards wiring now but can’t afford to stab at parts n see if they will work anymore..

What makes this problem better or worse?

Same all the time

How long has your 2005 Chrysler 300 had this problem?

2 years