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Drum beating noise - Longhorn Limited 2022

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godfather3300

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Hi All

New to the forum sorry if this is redundant I tried to look for an answer everywhere before I post.

My truck is about Two weeks old with 1100 miles on it. Last weekend I was driving back home and I had the music down to zero, left a parking lot and I hear this loud drum beating noise, like something loose banging against the body of the truck, it was loud. At first, I thought it was a song with loud bass and that the volume was turned down, like a muffled bass sound. But that wasn't it, then I thought the spare tire was loose and banging, that also wasn't it. I don't have a tonneau cover but I have the split tailgate. Anyway, fast forward to this morning during my commute to work, it started from my driveway and kept getting louder. I can't tell if it is mechanical or not, the pace is not consistent with the quality of the road or acceleration/deceleration. I can't replicate the condition (breaking, potholes, or certain speed / RPM) but it is worrisome, at a certain point it got so loud and aggressive that I was expecting something to pop off the truck. I was hoping that someone has heard or experienced this before, I know the dealer if they can't replicate the issue they will not do anything, and it is happening randomly so far.

Thank you in advance
 
Can you take a video or sound clip of it happening? You will have to upload it to a video playing service and then link to it from here.
 
djevox said:
Can you take a video or sound clip of it happening? You will have to upload it to a video playing service and then link to it from here.
Click to expand...
Thank you djevox for the reply. I will try if it becomes more consistent. So far it is random, I know my narrative isn't much to go with but I still also can't locate the source (whether it is front or back). Besides the fact that is it freezing temperatures where I am, I tried to roll out the windows and see if it sounded as loud from the outside but the engine noise was louder, I will need to have something taped to the body of the truck from the outside and permanently recording. I will update with a video for sure if I can record it.
 
Could be the rear cab vents flapping around. Try folding the rear seats to see if the noise changes. Several of us have removed the rear seats and applied sound deadening and foam to cut down the noise
 
I have the exact same random thumping / drumming on my '22 Limited. I also have not been able to replicate it on purpose or record it when happening. I had seen posts about the flaps and assumed that may be the case...but it almost seems too artificial to be something physically thumping. I'm starting to think it is coming from the active noise cancelling system trying to cancel out a frequency and getting confused. Open to all ideas that pop up here!
 
DB74 said:
I have the exact same random thumping / drumming on my '22 Limited. I also have not been able to replicate it on purpose or record it when happening. I had seen posts about the flaps and assumed that may be the case...but it almost seems too artificial to be something physically thumping. I'm starting to think it is coming from the active noise cancelling system trying to cancel out a frequency and getting confused. Open to all ideas that pop up here!
Click to expand...
That’s what I would guess…one or both of the the ATMMs might need work. Does it go away with a window open, by chance?
 
I also get a random drumming but mine isn’t very loud. Def sounds like it’s coming from the rear but sounds artificial like it’s from the speakers back there. ANC is known to have issues. I’ve tried recording it but it’s so low that it doesn’t really come across the video.
I was going to take the service tech on a drive until it happens. I also don’t want them not being able to replicate it and walking away.
 
wsutard1 said:
I also get a random drumming but mine isn’t very loud. Def sounds like it’s coming from the rear but sounds artificial like it’s from the speakers back there. ANC is known to have issues. I’ve tried recording it but it’s so low that it doesn’t really come across the video.
I was going to take the service tech on a drive until it happens. I also don’t want them not being able to replicate it and walking away.
Click to expand...
Thank you wsutard1, unless you get lucky, you might be taking that service tech for a long ride. what year and trim is your truck?
 
I agree with the hypothesis about the active noise cancelation system. Makes total sense since it pumps through the subwoofer.
 
I was able to make good progress this morning during my commute, few good findings:

  1. I think I am able to rule out ANC:
    • I opened the window (which theoretically disables ANC) and the noise was still there
    • I took one step further and performed a soft reset of the unit, while it was rebooting (the few seconds that the screen was off) I still heard the noise
  2. Back seats are folded since yesterday so that is not it as well
  3. seatbelts all are where they belong (I got excited for a second because the passenger seat belt yesterday was twisted so I thought Richard320 above nailed it, I appreciate it though)
  4. Better, I was able to record it!! here is the thing though, you won't be able to hear it with normal laptop speakers, the minimum will be both AirPods on with the volume turned all the way up, or for the best quality, over the truck's speakers, it sounds crystal clear. The noise I am talking about is clear at seconds # 0:04, 0:17, 0:18, and 0:19 in this linked audio. The last one is the clearest.
Thank you all, I appreciate everyone's input.

https://soundcloud.com/user-665228350%2Flonghorn-limited-22-drum-noise
 
OK, I've listened to it several times through my earbuds. Are we sure rolling the window down disables ANC? Maybe I missed the answer to this, but have you had the drumming happen while stationary? It really does sound like thumping out of the subwoofer. I think you need a buddy to get in the back while you drive and stick their head in the floorboard and listen.
 
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