I hear a weird nosie coming from the back. it almost sound like a nail is going into my tires. i hear it at low speeds (because my car is quit) not so much at high rpm. I dont know if my rear end blew up or what it sounds weird. I jack the back of it up and spun the wheels and held one side while I spun the other. everything seems to be working fine and I dont know a difference in driveability. I was just worried because I didnt want to get stuck somwhere witht the rear blowing out. Its a 8.8 out of a 86 gt with about 75k on it. it has 3.55 gears in it. I bought it off a guy on this forum. I cant remember his name. any help would be great. thanks.