This gets even better. I went to the dealership to look for the bolts that connect the axel to the differential housing. The bolts are "not serviceable" meaning you can't buy them. Service manual says to replace the bolts which I assume means they are TTY? Looks like I have to try my chances with some thread locker, try to size some new bolts from the hardware store, or buy a brand new axel that comes with bolts (not gonna happen).