The third member is not removeable on the Dana. You pull the carrier out from the back after removing the cover plate and pulling the axles. If you are looking to just change the ratio then it isn't too bad at all to work on. The gear sets are readily available out there. As far as references, the site posted above on the 9" was chock full of good info. I think there are similar sites out there with Dana reference materials. Nothing comes to mind right off, but I bet one of the other members will chime in. Let us know how you progress on your project.
