They have resources for technical assistance, THEY know what THEY need to do! That fancy scanner that they checked for the codes with? It's connected to a laptop. They can put said laptop in the truck, maybe even have someone else with them to drive, and watch the data and take a "snapshot" or recording of what's going on when the problem occurs. It could be as simple as a speed sensor getting a slightly skewed reading, they've had speed sensor issues for MANY years, like all the way back to the early 90's for their transmissions! Let's face it, transmissions are not known to be one of Chrysler's strong points! (I have made a LOT of money fixing them over the years when I was in independent shops, before making the move to GM dealerships.) What bothers me as a technician, is that they would have it go into a lower (that much lower, anyway) gear immediately when it happens. PM me, or hit me up on FB with the Dealership name.