I am rebuilding my rear-end because the seal was leaking. Anyways the previous owner must have rebuilt the rear-end also and left some parts out. It is missing the pinion spacer and the oil slinger and all the bearings and races were shot. I have a rebuild kit that has a new pinion spacer but I don't know what to do about the oil slinger. Is this really needed. Will the local ford parts department stock the slinger. Thanks in advance.