Spring or shock problem?
 

Ok....my suspension combo has little to NO give on it whatsoever. I raised the car up by the differential and ride height remained the same. Tires did not drop whatsoever. When I slow down to a stop, the car squeaks from the rear.. Like a rocking chair. Any rear movement up and down will make it squeak. Is this from bad shocks?? Could the springs be squeaking? And is it possible that the shocks have, sort of, 'locked up', giving me this insane stiffness? I floor it at 20 mph and I get wheelhop... I give it even a little pedal taking off and I get tirespin...it's getting very irritating!

Thanks everyone.

to me it sounds like shock bushings have gone bad. My bushings went bad and they squeaked. But you cant just replace the bushings, you have to replace the whole shock absorber. So try that

Funny story.. I had a squeeking noise coming from my front end for months.. every time I went over a bump or up a driveway.. well I thought it was my front shocks or springs, finally one day I took it in and it ended up just needing some lube on the sway bar bushings (? I think that's what they're called) Squeeking stopped and I felt like an idiot :D