Whats ur supra sound like???
 

well when i drive my car slow like under 20 mph i hear a kind of draging noise coming from the back end of my car. but it dosent make thaat noise when i am going faster and turn? i dont know if it has something to do with the LSD. I dont know if its normal or if its something i need to fix. thanks

It's not normal. It could be bearings, either in the differential, the wheel knuckles or the carrier bearing. Typically a bad carrier bearing is accompanied by vibration when driving at high speeds. Also check to make sure it isn't just a brake pad that's sticking to the rotor or a problem with the e-brake.

well when i pull on the e brake it goes away.

Well, it could still be a couple different things, but you might want to pull the rotors and check for signs of damage, loose parts, sticking pads or even just a ton of old brake dust.