Grind noise heard on engine and felt at gas pedal on initial acceleration

[Areal1]

It's kind of violent. It's loud and can be felt in the gas pedal. Always makes me think my truck is having a transmission issue.

did you ever figure it out? I own a 2014 chevy impala and been searching all over for any info on this, its happening to me and i even replaced the transmission and its still there. Any help would be appreciated.
I know its 2 yrs later but this is the only discussion that Ive found that talks about it. Thanks

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