Noise coming from flywheel?

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Micha

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As I wait to call the dealer tomorrow morning to get my truck looked at I thought I would pose this question. (I will provide video tomorrow when I go back outside).
My truck is a 3Feb2017 build with 35,000 miles on it.
I have had no problems up until now with it BTW.

When I would start the truck before from cold, sometimes it would make a high pitched metal on metal noise for half a second that just sounded like dropping a nickle in an aluminum pan. I accepted it because it went away immediately and wouldn't come back until cold start again.
But now, when I start my truck today after not driving it since Sunday, it makes a constant noise from the flywheel area. I know this because I stuck my head under the truck since I have no skid plates on right now. It actually sounds like a loose flywheel maybe hitting a heat shield.
Has anyone had this problem before? It goes away after warm up but only in neutral now. In gear its still faint, louder when I give it gas.

Thanks.
 
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