When you say rebuilt, do you include the gears, or mostly shims and "small" parts? I guess the only way to really tell the condition of the gears is after I open the cover. I read a response to a rebuild question in the archives and the recommendation was to only let a mechanic touch it. The question referred to a much newer model, and I understand that a differential is a differential, but is it conceivable to attempt this repair myself with a tech manual and the right tools? If so, since I would have to pull the diff., would it also be a great time to replace the CVs?