Hi all. Fairly new to this forum. Recently I bought a 2012 GT w/ Automatic Trans. Looking to get a new rear axle (old one is pretty worn, wheels got some play). Just looking to see what would be a good upgrade to the oem one. Car is supercharged by Procharger makes about 700hp (About roughly 600 to the wheels). I'm not too mechanically inclined but I'll take any advice I can get. Thanks.