BAD Vibration

Today i got my car out and changed the oil and cleaned it, well it has a really bad vibration when i am driving above 2 grand. It rattles so bad that the change rattles out of the console. The motor mounts and transmission mounts are new so it couldnt be because of that. I think U joints but i thought i would throw the idea past your guys

OK well i found out what the problem was i jacked up my car and shook the living hell out of my driveshaft, nothing. So i thought it was my tranny, well i was goin down the road lastnight and i heard a popping noise, since the car is almost 20 years old i didnt think anything of it, then i smelled antifreeze. I poped the hood and it was everywhere. I eventually got some antifreeze and poured it in, the water pump bearing shattered and it was leaking out of the hole in the bottom. Then the part that the pully bolts on beat the pump housing a oval shape instead of a circle so i replaced it, and everything is fixed and all is well if i can get my digital camera fixed i will post pics of the pump housing. Metal chunks were falling out of the pump water jackets. anyways thanks for the help. It is appreciated