Sheet metal sound when under load

[Upholsteryman]

2015 GMC Yukon Denali with 6 L80 tranny. So I get a loose sheet metal sound when driving underload. It will stop if I let off the throttle. Also between 1500 and 2000 RPM the truck feels like somebody has the brakes on,after that it releases, no codes. anybody ever else had this happen. I just replaced the transfer case because it had metal inside it. Thank you.

 

[Joseph Garcia]

Perhaps a heat shield has come loose or has been moved, and the driveshaft or some other rotating part rubs on it, when the engine is under torque and moves slightly.

 

[Tonyrodz]

Perhaps a heat shield has come loose or has been moved, and the driveshaft or some other rotating part rubs on it, when the engine is under torque and moves slightly.

I was thinking the exact same thing.

 

[Joseph Garcia]

I was thinking the exact same thing.

Great minds think alike, Tony. Or, as my wife occasionally states, small minds seldom differ.

I like my definition better.