At highway speed there is an audible click coming from the dash and the tack and speedo drop to zero and the truck looses power for a split second as thought it has been shut off, then it goes back to normal. Happened to me 3 times on the last 150 mile trip. Also when starting out going from park to drive the truck will act as if I shifted to neutral and the DCI will say shift to neutral to reset.? 200k miles, used to pull a horse trailer. well maintained.