Recently i have noticed something vibrating on my 03 3500. It sounds like it might be upfront, my truck has 107, 000 miles on it. Just wondering if any of you have any idea what this is or have had this problem.

When does it happen? is it inside the cab or an outside noise? Do you have any mods on the truck? It could be anything, a little more info would be great.
Sean

I can hear it when I get up to speed. I have a quad race box, 4in. dual exhaust, intake, bigger tires. I have had front hubs replaced at 80,000, front axle u-joints replaced then also, rear u-joint replaced at about 90,000. It also seems like a vibration.