170,000 miles and the rear diff has had it. Not in a mud bog or a rock crawl but doing about 25mph on the street. Sucks! anyhow, does anyone know if I can use a diff out of any K5 with a 10 bolt 8.5"? If not what years will fit? And if the whole diff won't work what about the carrier out of another diff? I plan on doing lockers and regearing, but for now I need a quick fix. and a cheap one too. Any help would be greatly appreciated!! Thanks in advance.