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IF not a bent or out of round tire... make sure the heavy spot of the tires(blue and white dots on the tire sidewall and valve stem) aren't aligned. They should be 180' apart from each other. IF not have a tire shop break the tire's bead and rotate the tire from the wheel. Reballance and recheck.
But I think another area is to check the center driveshaft bearing for wear. And also your axle drive shaft CV joints. You could have some pitting inside on of your CV joints.
An old trick on older cars was to swap the drive shafts from left to right so the CV joint axle's rotate in the other direction. This is only a temporary cue as over time the pitted CV ball bearings will wear groves inside the CV's. But it's something that you can do.
I would also check your differential out. Use a long screw driver up to you ear and listen for any bearing noises at speed.
G.L.
Dack
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