Annoying Sound??

Hey guys, I got a 94 GTP and I am about ready to shoot it. When ever I get around freeway speeds (55ish) my car starts to make an annoying rumble, its almost like driving with a bunch of lose lug nuts. When you hit 65-70ish, it gets to the put where its unbearable and you can hardly hear the radio. I’ve checked the lug nuts again and again, had my tires balanced and had new struts put in and its still there. Any ideas on what it could be??? Sorry I can't give you a better description of whats going on, I'm kinda at a lack of creativity tonight...haha
thanks
-josh

Could be bad bearings. The rumble is due to the bearings scoring the spindle or the bearings are very loose. Is it coming from the front or rear? Or is it possible to tell?

Could be bad bearings. The rumble is due to the bearings scoring the spindle or the bearings are very loose. Is it coming from the front or rear? Or is it possible to tell?

It is from the back, theres almost nothing coming from the front.