Rear Differential Bang 7AT OE LSD

Tractionless

At parking lot speeds when getting on the gas from a roll or upon slow speed manual downshifts followed by throttle application I will get a intermittent metallic bang that sounds like hitting the rear end with a sledge hammer. It has also happened when going from park to drive or park to reverse on occasion.

It sounds similar to the noise a LSD aftermarket mechanical differential can make when locking like my 2020 Silverado 1500 does.

While I understand a car can be put back to stock, when I bought it used in 2017 w/72k miles on it, tint wasn't even applied to the windows so it's doubtful the OE LSD was replaced with an aftermarket diff.

I only do spirited street driving, never drag raced, autox'd, etc. and currently have 102k miles. Pertinent mods are; OE subframe bushings with Z1 collars, diff. brace bolted to the subframe, and Whiteline poly diff bushings.

Would this noise be indicative of upcoming diff. failure or can it be attributed to sudden slack take up between the pinion and ring gears?

Thanks for any insight you can lend.

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Toys Not Tots