i tried running a search and was surprised to find that noone has experienced this before:

i drove up to new hampshire to go to one of their beautiful state parks. the drive up is a straight shot and everyone goes around 75 to 85 mph. around 80 to 90 my rig started to shake... like it was some pos ford fiesta!

it wasnt all that strong a shake, but it was just consistently vibrating.. not just the steering wheel -- i drove there alone (met friends) and looked over to see that my passenger seat (shotgun) was shaking like it was a vibrating massage chair.

is this normal? the truck is fully aligned, tires are way too new to have problems and are balanced. any ideas???

 

Definetly wheel balancing. I am going through the same problem at 72 - 75 MPH right now. Take those puppies in and have them balanced.

What really sucks is that they can't balance my wheels any further. They are the best they can be. And, after 4 balances, I believe them. I may go back to stock wheels, coated black of course.

 

hmm.. i just had my car serviced and asked the guy to check the tires while he was at it. must not have done it.

ill have to swing by and have a word. was it bad that i drove for 3 hrs (total -- there & back) like that? i doubt it...

 

No, not in that short amount of time. Extended driving under extreme load with a wheel out of balance can throw a tire out of balance - then you're screwed. You should be ok.

 

great, thanks!