Here's the deal, I just had my suspension changed and the rear subframe boxed in. I also had the rear rotors and pads changed. When I took the car in, it wasn't making any noise in the back. When I got the car back...there was a terrible creaking sound in the back. The suspension has been on for about 2 weeks now, and the noise now seems to be mostly coming from the right rear somewhere. The noise is fairly constant, most prominant when I go around corners or turn the car. If i go over a speed bump slowly, it won't make a peep.
This is what I've tried so far...
1) Lubricated all the areas of the e-brake cables that could rub up against something and create noise.
2) Lubricated my sway bar bushings
3) Took my new rear springs and struts off, (the BAT's come with rubber hose on the bottom coil, but nothing on the top coil)and put the stock plastic cover from the original spring onto the top coils of the rear BAT springs. Made sure everything was well lubricated, and put them back on. I did this because it seemed like the noise was coming from the strut perch area

I have no idea what else I could do or what it could possibly be. I'm starting to get somewhat frustrated, as I go back to school on saturday and won't have access to a lift down there
Any suggestions??? (sorry for the long post)