Ok just got the car off of the jack stands after working on it here and there for six weeks. I replaced teh trans with a 96 one and teh diff with a 3.27L also out of a 96 car. The trans is currently overfilled but that's not realted to my problems. My speedometer is way off, a little abve 2x speed from what I can tell and there is a hollow, rythimic scraping sound from the rear. The speedo I think is a result of teh snsor on teh trans being different between the two years, but am not sure. As for the sound from the rear I feel it may be the drums being rusty cause the car sat outside, the diff being low on fluid (I think I filled it all the way but was having a hell of a time), or something touching rotating parts. One buddy that road with me thought it was bad bearings in teh diff but I know it was good when I got it. What's everyones thoughts? I probably won't be able to get back under the car till tomorrow so any suggestions before then will be tested and appreciated.