Apparently my axle bearings are shot and every shop around wants $1800 to repair/rebuild the diff. Seems like it'd be cheaper to replace the entire thing, so I guess I'm hoping that someone here has the same truck and wants to get rid of the back end.
I'll try to get the ratio and whatnot tonight. If it helps, truck is 4cyl, 2.7l manual, extended cab. I'm located in Minnesota, but would drive some ways if it was worth it.