I put a new set of Super High Performance Tires( or so there called) on my car and when i left for work this mornig i jumped on the gas and my car shook violently from the rear end. I did a powerslide right when i got the new tires but now everytime i try to spin'em all i get is extreme vibration.
any advise before i start trying to figure out wahats wrong?

 

get your rear tires balanced.

 

How long of a powerslide did you do - could you have flat spotted your new tires?
I would do what AlwaysDanked suggested first, then start checking things like lca bushings, panhard bar bushings etc....
How many miles on your ride? - Is the rear end starting to wear out and after your last powerslide, you may have caused some damaged to the internals of your dif?
-Andrew

 

Wheel hop maybe?

If these new tires are sticky than maybe you did hurt something internal in the rear.

 

It has a rebuilt rear suspension, but it has a fourth gen rear with 170,000 on it. the power slide wasn't to long but i slung it pretty hard. I'll take the car back to the tire shop and have them check the balance but i hope i didn't tear up my posi.