Bad vibration 65-70mph

i have all tires to 35psi and all just balenced. I also put a carrier bearing shim kit on from OME but still have a very bad vibration. What else could be the cause?

 

Check the rear drive shaft for damage or loose bolts.
Had any work done recently on the rear drive shaft? It could be 'out of phase' .

 

No never have had any drive shaft work done ever

 

Road force balance

 

They are ballenced at the dealership so i would think they have a good tire ballencer. I have also had them done at a small local shop and ive watched them do it on a road force.

 

and the driveshaft u-joints are in good shape?

 

Seem to be, no play and greased every 5000 miles

 

I'd almost try another set of wheels and tires for shits and giggles

 

Dont have any to try...wish i did tho