[jrob56]

Could just be wheel hop, my experience with 5th gens is limited, but man GTO's did not like tire slip. Sounded like wheel was beating its way into the cabin. IRS as well and similar platform.

Second theory and less likely on a stock car. Buddy had a fab9 under a 4th gen that was lowered and on hard acceleration car would squat enough for top of TA to hit the floor, sounded awful. Luckily it clearanced itself before we found it haha.

I know Solid Axle vs IRS, diff susp setup, but point is could have just been suspension, wheel, contacting the body somewhere. Id look for some witness marks near wear you heard it.