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Discussion Starter · #1 ·
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
 

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Dangling clamp,or loose tunnel brace, ???
 

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2015 Rallye with Plus Package
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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.
 
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