'04 FX4 w/ 6" Fabtech 35" ProComp A/T For the last 3 years, been having problems with the truck shaking while going down the highway. Had new set of tires balanced and rotated very regularly, had it aligned at 4wheel & Offroad and still shakes. What could it be? Ideas? Tired of ruining good expensive tires.

 

I've done give up on this problem. My truck bounces and shakes when it wants to. Sounds silly I know, but some days my truck rides smooth with no bouncing or shaking. Then the next day its shaking. I really think its these trucks are so sensitive to tire pressure. I've tried everything I know to do. Had multiple shops look at it and all says there is nothing wrong with the truck.

 

in the same vote. and just giving up

 

man, who knows! Maybe a rim slightly bent? Prolly would have noticed when they did the balancing though.

 

big load e tires are weird like that.

 

My truck only gets used on the weekends so after sitting in one spot all week when I first take off down the road it shakes a little and has somewhat of a bounce. The Kumho's don't do it as bad as the Nitto Terre Grapplers did. I'm guessing from sitting in one spot so long the tire comes out of round and take a little while to go back. This may not be your problem, but just thought I'd say what causes it for me.

 

Somebodys mentioned the driveshaft causing this but mine does it and i have no clue why