I live in mooresville and just purchased a 550 with some rear end issues. Don't know if yours is still apart but would like to pick your brain or if yours is still apart would love to come see it. I am about 5 Days from having my manuals and am going to have to pull the top cover off to see what is going on. Do you still have your old rear end? Reading the posts it looked like you picked up a new rear end. 

Cell phone is (317)966-3890

Thanks
Jeff