[Phil219]

Terrible racketing metal sound in the exhaust about four seconds after cold start. Goes away when shifting into reverse or accelerating in drive. Returns with a vengeance creeping uphill in a drive-thru or parking garage entrance. I have tapped around underneath looking for loose brackets or anything and can't figure this out for the life of me.

Here is a clip

Any help/guidance would be appreciated

 

[gapi]

Dangling clamp,or loose tunnel brace, ???

 

[NJMOPAR]

Sounds rotational, like a torque converter shield scraping.

 

[Phil219]

Thank you both. I'll take another look under there.

 

[BobCollette]

The video isn't there, so I couldn't listen to it. However, on my '15 Rallye, last year I started getting a metallic rattling sound from underneath the car. Sometimes it would happen frequently, other times I wouldn't hear it for quite awhile. It turned out to be the heat shield for the catalytic converter. The mounting holes in the shield had rusted through. Fix was to put a large washer underneath the mounting nuts so it was contacting an area of the shield that wasn't rusted. Hopefully, you have something similarly simple to fix.

 

[PeteJones17]

I get a similar noise on my 2017 RT but it quickly goes away. I've assumed it was the active exhaust solenoids kicking in.