Originally Posted by
nicholasxuu
you greased diff seal o-rings with black grease isn't it?
Maybe from that factory. I never removed the o-ring when I changed it the first time. I did today just making sure they were good. I guess there could have been some old dif fluid under the shims inside and between that and the o rings it could have turned it black. But I don't know if it could have turned it that black. It was pretty dark, almost like it was full of worn metal shavings.