It's a 2019 challenger scatpack, about 15,000 miles ago I supercharged it and changed the rear dif fluid (believe I used royal purple 75w 90), I have a rear diff brace on it and it has had a tcm/pcm tune. It does have a slightly hard shift when doing a hard acceleration, I figured the tcm tune just needed to be fine tuned a little for that part. More @Wikipedia
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