I have a 2005, 1500, quad cab, with 12000 miles on it. I started noticing a vibration with the truck at 38 mph and 60 mph. It's very noticeable when I'm going at a constant speed. Four times at 38 mph the vibration was shuttering. The strange thing is when I take my foot off the gas pedal the vibration goes away. It almost feels like the bumps in the road but it's not. I dropped it off with my dealer and the service manager took it home that evening. He said he wasn't sure if he felt something or not. He doesn't think it's anything to worry about at this time. I know it never ran like this before. Does anyone have any idea what the problem might be??


Thanks.