Very periodically the truck will go to idle at about 65 mph. Numerous checks and part changes later it appears that it has more to with ram than speed. When it happens, keep coasting and within 5 to 20 seconds (a lifetime) it goes back to normal and away you go. Only because just every motor part and computer has been changed have I landed on the train. Diode, bad wire, loose thingamajig, ANYBODY else experience this ?