My camry also vibrates?

My 93 Camry le vibrates at highway speeds. I had the tires replaces, balanced, rotated, and had two alignments. Still vibrates like crazy at 50 mph. Something to note, when the car begins to shake at high speeds I let of the gas and it stops, once I gas again it vibrates? Once I get over 70 it also stops. Is this a motor mount issue, I looked at the engine cradle mounts under the driverside and passenger side door and they look ok but they are both covered in oil. Recently I was driving on the highway and it started doing it usual vibrating, then the car pulls hard to the right and vibrates and makes a clunking sound, like something broke loose. Could this be a CV joint issue also?

Have you checked your cv axles and other suspension components?