real head scratcher?????

[semperfi09]

2004 6.0 mbrp turbo back sisnter coolent and edge evolution canned tunes with insight when I downloaded the tunes truck shifted like it was tring to break my neck on performance tune the other day it got stuck in 3rd wrench light came on and through codes p0766 ,p2703 pulled over shut off and ever since the trans ****s smooth as butter but every time I clear dtc's those two keep coming back but truck drives better than before the incedent please
help

[TheRobenator]

Simple, take the tune off and clear the codes before driving it again, once the tune is taken off, drive it. If it works good, then it is the tune, if not, then it is something internal of the transmission. Do that and get back to us.