I blew the spiders on my rear end and am trying to replace them. I didnt look close enough and thought it was open so I ordered the gears. After starting to rip it apart I find that I ordered the wrong gears. What are the factory locker options available for an '89 corp 10bolt? I doesnt look like a posi unit so I'm wondering what it actually is. Does anyone know where to get spiders for it too? Thanks.