A friend of mine just stopped by with his brand new 1 ton crew cab long bed dooley with the 600 and the automatic. There seems to be a valve train rattle at idle and when first taking off. The engine was up to temp. I would hope it settles out as it breaks in since it had a whole 102 miles on it when I took the wheel. Have any of you new Dodge guys heard the same rattle? Does it quiet down? It did not seem to be all the time, just sometimes.