So I got home finally and am installing some geo brackets and I looked where the tag is supposed to be on the diff, and nothing there, further more on the back side I found 110k in paint maker. So they got me on that one most likely based on what I'm seeing is a salvage yard axle. And probly trans to based on the matching fluids. I've had to do almost every maintenance that was suppose to be up to 100k since I got , one thing after another started failing. I'm gonna assume was a behind the camper jeep and left in gear when pulled, and not daily so no maintenance. But that's assumptions, could be any reason behind it. But definitely need to 100% verify that it has matching gears, before 4 wheeling