mOdD

Have a '06 and it's annoying to drive at highway speed because it vibrates so much...I look in the mirrors and the box is shaking and rattleling up and down. I had an alignment done didn't help at all.
Also has a driveline vibration just when you take off after a full stop.
This thing just a POS or what?

camstng66

Snow in rims??? That has been the cause of a few of these threads recently...

Ballin STX

I had bad vibration but had road force balance done on my truck and it rides great now.. might want to take that into consideration.

mOdD

Thanks for the tips guys...but what is road force balance?
It's not snow, been doing this since september.

seniorFORDtech

sounds like you have a bad (loose/frozen) u-loint on the rear driveshaft this will cause your vibration at highway speeds and more so on acceleration..
hope this helps

Ian_T_S

I had a similar problem and turned out to be a bad/siezed rear caliper which warped the hell out the rotor..couldnt really feel it in the brake pedal but it shook all the time, which of course turned into a bunch of other problems..but from what you described...mine wasnt as bad as yours..just a thought

blackbetty

didnt the bed box bolts have a tsb?

nashtruck

Something that spins is out of balance. If you have allready checked the ovious- tires, then I agree with seniorfordtech, driveshaft u-joints. I used to have to change them yearly in my Bronco because of the bad angles from a lift kit.

torqgasm

How often should u-joints be replaced wile were on the subject

nashtruck

Change em when they go bad. You will get vibrations, clunks when changing gears, you will know. I changed my Bronco yearly because I had one break on me. Had to drive home on the front axle after removing the rear driveshaft. The truck had a 4 inch suspension lift and I was rolling 35's on it. Bad angles with the drive shafts on a short whellbase truck.