Yeah, when I ordered my 18, CC, 6.2 the owner (a close buddy of mine) of the dealership looked at me and said you know, you may have issues with the transmission clunking, told him I’ll bring it back to him and he’ll fix it, he laughed. First week, drove to Austin and noticed it, then while parked in a parking lot it felt like I got bumped, no one around but the transmission just thumped hard. I later did a tune, turned off the AFM and along with not having shifting issues, haven’t felt the thump since Sent from above