I'm planning on replacing the rear differential fluid in my 2006 expedition which has 4 wheel drive. I'd like to remove the cover and clean out the housing before I replace the fluid. There isn't much clearance by the cover. Is it possible to remove the cover for cleaning by just removing the cover bolts? I could not find any videos specifically showing a gen 2 expedition. If not I guess my over option is to just drain the fluid and replace without cleaning the housing. Thanks