Could some one please point me to the step by step on replecing the differential?

I have to replace mine and would much rather do it myself vice paying someone almost a grand for parts and labor.

I am pretty mechanically capable and have done a lot of work, but never a rear end, so any advice would be helpfull.

FYI yes it's the diff, the rear tires are "dragging" when turning (sort of like a fully lock rear would do) and the scuffing/scrubbing on the tires indicate as much aslo. I guess 225k (give or take) on the G80 was all I was going to get out of it.