2013 E-450 Chassis / "clang" going in and out of drive

Topic says it all. I don't think it's a problem, but there is a distinct metallic "clang" when going out of park and into drive sometimes. Might be doing it out of drive and into park too, can't remember.

75k miles on it so far. I'm sure it's worse when I'm on some kind of a grade, but I just wanted to see if this was normal for this drive train.

Thanks for your comments.