i would most definitely check your u joints, does it happen when you accelerate/decelerate? or is it constant?

if its constant i'd check to make sure your tires are balanced. i dynamic balance most of my offroad tires to prevent this.

 

My 09 does that, around 57-63mph.

 

Have the wheels balanced again to remove them as culprits. Weights can fall of quite easily. I have always marked my tires sale ivoice with a small diagram showing the amount of weights on each tire. Lets you know when a vibration comes up, what to potentially elininate. Mind you tires can change over time. however this can help you nail down and answer.

 

I've had the tires rebalanced and no resolution. The vibration does not only happen when I accelerate or decelerate, it happens most noticably around 55-70. My tires are producing a somewhat chopped inner edge. I have had it in to the tire guys 5 or 6 times. I have them rotated every 3,000 miles and the alignment has been checked and tuned up a few times. I'm just lost, I'm guessing it's just the tires and thats the way it is!

 

chopped inner edge? in the rear?

if your tires are cupping, your rear shocks are shot and the tires are bouncing around everywhere because theres no more dampening.

i'd check to see if your rear shocks are leaking

 

Check to see if any of the belts are broken, look for noticable bulges in the tread an side wall that run in a straight direction, radially across the tire.
Check the driveshaft by hand to see if there is any play in it. You can also try gently prying betwwen the yokes to look for play as well.

 

my buddys f-150 does it but her has 36" but he got them rotated and it stopped.

 

I pu tnew shocks all the way around, so I eliminated that. Is anyone else having a "clunk" after they go through an intersection or round a turn and then give it gas again? My dad's
04' colorado does it also but not as noticably as mine. Is this common? Anyone else experience this too?

 

1. are they both 4x4 ? 2.mark the tires and rims on jacks and do a run out center of the tire
and the outside of the rim at the lip. The clunk is the drive shaft . My clunk started at 40,000
miles.
oldman (MI.)

 

When you say "Run Out" what do you mean? They both are 4x4's mines a Z71 and his is just a 4x4. Is this anything to be concerned with?

 

put the truck up on jacks and mark the center if the tread with yellow chawk
now put a pointer gage to the tire center and spin it . It will make a line to see
if the tire is bad . Go the the rim and use a dial gage , spin the tire to see if the
rim is out of round . Slow...

 

I still don't see how this can cause a driveline clunk. I had the dealership do a road force test whick tests the tire and checks to see if the rim is bent or mis-shaped. Is it anything to worry about or is it just the way it is?

 

Drive line problem are all by them self , wheels are another .
What is a road force test and how is it done ?
Also , the clunk after going through an intersection could be a loose shock ?

 

Intersections n turns it clunks? Sounds like your slip yolk in ther rear diff. is going dry; re-grease it or buy a new one. No rear diff additives for G80s or you'll delay the engagement time.

 

You think the stealship would have check that and made a statement one way or the other . 91,000 miles could make it time to rebuild . My S-10 was the same way. If you keep them greased they last . My S-10 was droped 3/4 at 30,000 miles .

 

Good Luck getting the deal sorted out! Come back with good news!

 

ive had these tires on a 98 f150 and i had no problems with them, i loved those tires... i almost cried when i sold it but that was also the day i got my 355