Mine has a slight shudder (like 1 second worth, I don't even think I would call it a shudder, more like slippage, kinda
) right at 40mph. But all of my cars has one speed that I fell a little "hiccup" at. My Fusion is 30mph, when I am slowing down past 30mph I feel the tranny do some funky stuff and then it is gone. My old Altima was 28mph, it was the same feeling as the Fusion and the new Jeep. I consider it just part of the experience and don't let it bother me. If it was a big shudder, I would be upset.