guys i drive a 06 fx4 supercrew, i have been experiencing a vibration between 50mph and 65. Below that no vibration and above no vibration neither.
I replaced already the engine mounts, trasmission mounts, u-joints on both driveshafts however the u-joints are not the original ones they are universal,i dont know what to do any help guys i will apreciated

 

Have you had your tires checked for balance and out of round?

 

^^^x2 where specificly do you feel the vibration? like in the steering wheel or the whole truck?

 

Yes they are balanced it is underneth that a feel the vibration

 

in the whole truck steering wheel is fine i dont know what to do.

 

dam...anything beyond that is beyond me...sorry dude..

 

Try having you driveshaft turned 180 degrees and reinstalled, see if the vibration lessens in any way at the same speed. Mine would "whip" at around 80-90mph (it's a one piece and it sounds like yours is a two piece?). I had it removed and rotated 180 degrees and the vibration changed completely. I then went out and bought an aftermarket driveshaft and now I have no vibration. This may not be what's causing your vibe, but may be worth a try. Good luck down there.

 

They may be balanced, but are they true and round? Are you sure you don't have a bent wheel?

 

thanks dude anyway apreciated your input on this.

 

let see if i understand you. first of all what driveshaft both and what you mean by turnig it 180? apreciated your inputs

 

well they are brand new tires and the vibration was before i put the tires but i am going to rebalance it again in other place that a friend told me i keep you guys updated what going on apreciated.