I flat spoted 3 of my four tires about 2 months ago. i just got 4 brand new bfg at kos and i still have a vibration at around 40 mph so i took it back to the tire shop they rebalncened all the tires. It was still there so i went back and he put 2 brand new tires in the rear and the vibration is still there. I put the truck in neautrul and the driveshaft didnt have any play but could the vibration be coming from the u joints. The truck has 184,xxx miles and as far as i know the u joints are stock.

 

You might have a rim that is slightly out of round. even balanced you can still get a vibration. Have them spin up the rim by itself on the balancer and watch to see if it is true. I have seen it happen where mechanics will start to just throw parts at a vehicle to fix it and it be something simple like that. Hope that helps

 

possibly if u have an lsd its starting to fail...i know mine is

 

They did a rim run out an all four rims. i do have a lsd

 

I got 4 brand new tires and still have the vib all of the tires are in the high 20's in roadforce. i hate bfg at's

 

I'll take them if you don't want them

 

naw ill keep them