Jams, the same thing happened to me, I will bet your rear end is out of a lincoln mk7, it is a little wider than the 8.8 out of a mustang, in my opinion my car will never sit right until I get a narrower rear end and then can set the car down level instead of at a "rake", mine was also open, good luck on any help, I ended up putting a power trax limited slip in mine, and am now looking for a narrower rear end out of a late model mustang.
