Hi everyone, this would be my first post here at gmfs. I really like the site and hope that I may have some positive input on the site. My question is if anyone has heard of any type of servicing or rebuild for the factory 10 bolt 8.5" rear LSD unit. I rebuilt the axle about a year ago and and at that time I read on alldata that the factory units are not serviceable. While that may be so, Im just hoping thats bs.