Some of you may remember I was having a banging issue in 4x4. Well i went to drain the oil and pull of the front cover and more metal than oil came out. I then just started looking for a new differential since that one was obviously toast. Found one and installed it today and pulled the cover off the old to have a look. Look what I found. All that shiny stuff on top out focus......ya thems metal shavings!!!!

Think may cause some noise. So what are likely causes of such a master cluster-frig?