Alright I have been beating this forum to death today trying to find the answer to my noise that was discovered on my ride yesterday. I would call if almost a rattle sound as the rpm build when you shift it goes away till rpm start climbing. Between 15-20mph it's the loudest under 15 you can't hear it. I know there are numerous threads on this that I have read but I have not found one with this complaint. I have videos but do not know how to post them here. I know valves is the number in thing to check but to me this doesn't sound like valves.