So since I picked up my 4.10 Posi rear Ive been trying to decide what to do with my old one. I've decided to keep it but i haven't been able to find out how to Moth ball it for long term storage. I plan to wrap it in Plastic ( Industrial shrink wrap like the kind used for wrapping pallets) and cover it in a tarp. My biggest concerns are the fluid and making sure it doesn't seize up or anything of the link. Should I drain it or keep the fluid? is there an additive i should use to make sure it stays usable? any recommendations are appreciated.