I remebered this from the old site

http://club.vmag.com/ubb/Forum39/HTML/002412.html

I put on new brakes this weekend, among other things, and when I took off the right rear disc, there was grease everywhere. My question is, because the rear axles aren't servicable (that I know of) how can I take care of this problem? Is this considered part of the powertrain? Can I get it done under warranty? Last, if anyone has had shop fix this, how much was it?