Yeah, it's normal. They adjusted your shift pressure so that it shifts faster. My car hits 2nd and 3rd hard when I'm just coasting around the mall, but it shifts firm and smooth when I'm around 3k. At WOT it shifts hard and chirps the tires going into 2nd.
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BBK CAI, Pacesetter Long Tube Headers,SLP Hi-Flow Cats, Pypes X pipe and Violators, Shaftmaster's 3.5" DS, 4.10's w/ T-Lok, 93 R tune by BAMA, Diablosport Trinity Tuner, PATC 3000 RPM Stall Converter, Zex Nitrous 100 shot