If you were already initiated, I would recommend getting in touch with the president of your fraternity's chapter at IU. If you want to transfer and are an initiated brother, the chapter will have to vote to allow you to affiliate. If you fit in with the chapter, this may be a fairly simple process. If you don't, and the chapter votes to not allow you to affiliate, you will just take alumnae status.
The chapter at IU may (and likely is) be nothing like your previous chapter.