I'm really not sure what I'm looking at under the (remains of...) the axle. It looks like a torn double-wall shield of some sort. It's been years since I've been under an MDX (sold mine long ago) but I know that it wasn't difficult to tap out that right axle, or at least to get a rod up there to do so. Pulling on the axle is the wrong way to do it (as evidenced by the photo and previous comments). ;-)
Here's a snippet from the manual showing the process - if there's something in the way, it either shouldn't be there, or should be removeable...
Here's a snippet from the manual showing the process - if there's something in the way, it either shouldn't be there, or should be removeable...