Please help. New redeye charger makes soft “clunk” noise every time car gets started.

Under the drivers seat, could be your driveshaft.
Does your dealership have a certified SRT tech?

But I will tell you, I had a clunking noise and couldn't figure it out. The problem was an item in my trunk.

Linda

My AEV sound like tin cans rattling every now and then when in my garage.

jamserg said:

The best I can describe the noise, it’s like when doors get locked, similar sound, just softer, not as pronounced

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Probably a dumb comment, but I'm good at those:

You do realize the doors automatically lock and unlock depending on speed and gear selection, right? I assume you know this and ruled it out, sorry.

2ndAmend said:

Probably a dumb comment, but I'm good at those:

You do realize the doors automatically lock and unlock depending on speed and gear selection, right? I assume you know this and ruled it out, sorry.

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Yes, I ruled out that and something loose in my trunk. It’s very consistent. Happens ONCE per car start. When car is hot happens right after engine starts. When car is cold, it takes1-2 minutes of driving and happens when I come to a complete stop.

Alchemizt said:

I am glad you posted this. I have the same issue with my non-redeye hellcat charger. I’ve had it 2 months and now have 1300 miles. It’s a very strange sound. Doesn’t appear to hurt anything but it’s annoying for sure. I will probably just take it in soon.

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If you happen to take it in before I do, could you let me know what they think? Thank you

Didn’t hear it today. Hot here in Florida. Cold/Hot restarts. No clunk. Just about 900 miles now.

So, stopped by my dealership today. Started describing the noise and was told right away it was active exhaust baffles. They were 100% sure and told me the noise is a known thing, but some cars have it loud some don’t. I was told even if they were replaced chances are the noise would still be there. Guess I have to live with it. At least I know what it is.
p.s. I just realized that I can check if they were right. In track mode baffles don’t close, so if I start cold car and drive in track mode, then the noise should not be there (please, correct me if I’m wrong).

Yep, I got pissed after 3 replacements and went with aftermarket exhaust with simulators.

I've only heard mine twice, & it's not a big deal to me. Let it roll!!!
It's the nature of the beast.
I didn't buy a Cadillac

Very interesting.......Mine does the same....I was thinking possibly a loose fuel pump or line.....I guess now I'll pay more attention

Bad news. Started the car this morning, put in track mode right away. 1 min later same noise. So I don’t think it’s an active exhaust baffle. I’m back to square one. Unless track mode didn’t keep exhaust fully opened (which I doubt based on the car sound).

My 2021 SS doesn’t do this, but my 2020 redeye did the same thing. It didn’t really worry me. It would happen after cold start, within 3 or 4 minutes. It sounded just like an AC/Heat bent diversion door changing position, sort of like a soft pop/clunk. But the sound came from behind me on the drivers side.

Chancey said:

My 2021 SS doesn’t do this, but my 2020 redeye did the same thing. It didn’t really worry me. It would happen after cold start, within 3 or 4 minutes. It sounded just like an AC/Heat bent diversion door changing position, sort of like a soft pop/clunk. But the sound came from behind me on the drivers side.

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That's exactly what I have. (sound, not SS) Also if I remote start I can hear from the outside of the car. Inside when its running sounds like someone taps the rear fender.

Steiny said:

That's exactly what I have. (sound, not SS) Also if I remote start I can hear from the outside of the car. Inside when its running sounds like someone taps the rear fender.

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Exactly.

What if you racked the car, had someone underneath near the back with a light and then someone in the car moved the ignition button to the Run position (foot off the brake pedal, do not start the engine), what do you hear and what if anything does the person under the car see/hear? Should be able to see and hear AEVs.