I have a 2003 F80TLRB that the trim seeps a little oil from under the threaded cap the lift shaft goes through. I'm thinking the big o ring under that cap is bad. I looked on a couple sites online and can't figure out which kit I need or if I should just get the one o ring. Also looking for an economical wrench to remove the cap, I'll probably only ever need it the one time so I don't want to spend a bunch on it.