Strange noise in the transmission when idling in park in cold start

[HotChiliRam]

Hello, A few weeks ago I remote started the truck and when I came close I heard an awful clunking noise that came from the tranny I guess, I haven't take it to the dealer yet but wanted to ask here if anyone has experienced something similar and what was the problem.
I attached a video so you can hear the noise.

 

[securityguy]

Hello, A few weeks ago I remote started the truck and when I came close I heard an awful clunking noise that came from the tranny I guess, I haven't take it to the dealer yet but wanted to ask here if anyone has experienced something similar and what was the problem.
I attached a video so you can hear the noise.

The trucks not moving...you sure that's the tranny???

 

[HotChiliRam]

Not sure, but when I put it in drive the sound stopped

 

[AXE]

Hello, A few weeks ago I remote started the truck and when I came close I heard an awful clunking noise that came from the tranny I guess, I haven't take it to the dealer yet but wanted to ask here if anyone has experienced something similar and what was the problem.
I attached a video so you can hear the noise.

Do a search, I think someone else reported a problem like this.

 

[HotChiliRam]

Do a search, I think someone else reported a problem like this.

Already searched and found nothing similar to this.

 

[AXE]

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gmauthority.com

 

[HotChiliRam]

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gmauthority.com

Appreciate it