no one knows what the problem , doesnt want to shift at 60

ive had nothing but problems with this truck. every problem mentioned has been wrong with this truck. now it doesn't want to shift at 60 miles an hour. no one seems to know what the problem is so far im out 3,000 dollars in diagnostics transmission shops mechanic after mechanics and know one can figure it out. broken dash at 30,000 miles. they worst truck ive ever owned. which I never bought a dodge.will go back to chevy.