Re: Shuttering at 40mph and up
I have an 05 4.7 with 83k and mine did this going 40-60 mph it seemed liked. I replaced my spark plugs this weekend and while I was at it I cleaned the throttle body, it was absolutely caked. I drove to work today and everything seemed great. I'm not sure if you are having the same issues but before I fixed mine it seemed to jolt, hiccup, stutter, or pause, not sure how to describe it. Good luck sir.