This little part is what I am missing. Dodge and GM both use the AAM 11.5 axles on the older trucks. Nothing about this in at any parts store. O'Reilly guy helped me find it. They didn't even have it in their system. But it was in Advance Auto parts system for the 2014-2015 trucks
https://www.randysworldwide.com/?sea...t&sortby=yukon.