Well i got the rear in there and the brakes hooked up. Took it for a drive and there is just a barely hint of whine but it dont change in tone or get louder. You can barely even hear it. I mean most gears have a little bit of whine to them. Im just going to leave it alone and if it gets louder or starts actually making a noise then ill pull it apart. The posi definately works. I gave it a thourough test of about 10 burnouts in a row and it smoked both evenly and as long so thats good. The 3.73 gears also helped out a ton over the stock 3.08s. Its so much faster now with my combo. Their awesome.