[mbelcher0014]

i have a very annoying situation that i cant figure out... i have a 2002 F250 with a 12in lift and 39in tires, just had the entire front end rebuilt so i know its nothing there. It rides smooth until you reach 40-47 mph then it feels like it bounces up and down... if you stay on the throttle and move past the 40-47mph mark quickly it wont do it but when crusing at like 45mph it will hop and shake you to death..

any ideas on what this can be

 

[mbelcher0014]

My truck does the same thing im pretty sure its an un balanced tire. But I have had u-joints make a bad vibe at a specific speed

yeah i took my truck out tongiht for the first tiime in a while and i was wrong after it gets past about 50mph it no longer hops it then kinda vibrates.....

 

[mbelcher0014]

thanks guys, yeah you are most likely 100% right, i never thought to check if the tires were balanced... in which i can almost be they are not... i bought them already mounted when i bought the lift and i hear no beads or poweder whn i turn the wheel slowly while jacked up... so im assuming they are just mounted and thats the extent of it...

BTW is it tru you can balance your tire with airsoft gun beads.. if so how do i go about finding out how much it will take

 

[mbelcher0014]

yeah ill get them balanced asap... and i lengthed my driveshaft btw...

 

[mbelcher0014]

Did the vibration just start with the new tires?

Is it a one piece driveline? Or did you use a carrier bearing drop?

its a one piece.. and its been vibrating the whole time the lift and tires were put on but it set and i think may have flat spoted the tires but i duno... the tread looks even how ever.... i think personally its the tires because i know the front suspension is done right but it does feel like its coming from the rear tire area