Cardone is the brand you want on rockauto
They have "Cardone Select" and "A-1 Cardone". Cardone Select is suppose to be brand new to oem spec........yadayawho.knows
You want A-1 Cardone. That is a rebuilt/remanufactured Ford motorcraft axle.
I also believe the one you buy from ford will be a reman as well.
I would not hesitate getting the A-1 Cardone, pretty easy install and 10% of the price. It might be the only american company on Rock auto.
I'm also having a sound in my axle after I back out of my drive way and then go forward. Its always two clunks and then never does it again until next time im in my driveway. I just don't know which side it is tho, im hoping this isn't anything in my new transmission/Torsen, since i installed it myself. (1st time doing it)