Getting a pretty bad vibration (i think its from the drive line) above 60mph. I just got the rear shaft u joints replaced and had the shaft balance checked. The drive shaft shop said it checked out great. Tires are properly balanced.

the vibes started after i replaced rear shaft u joints prolly 3-4 months ago, i though i had bent the yoke 'ears' but the drive shaft shop just said everything was fine...

what am i missing??