I have an '07 FX4 SCrew and I'm starting to feel vibration at speed when the engine is not fully warm. I know this was an issue when I had my '04 and frequented this forum, but I haven't heard as much as of late. The vibration is so bad that it shakes the wheel pretty bad and can feel it through the pedals. Goes away after the truck warms up for the most part. It is getting worse as the weather gets worse. I have the stock 20"s on the truck. Am I just paranoid. Any ideas what it may be?

 

I'm sure others will chime in with the same, but I've got the 20's too. I think it has to do with the Pirelli tires developing a flat spot after extended times (overnight).

I've always had that issue. Hopefully, when I get new tires it'll disappear.

-Shannon