When I drained the gear oil in my front diff about 3 weeks ago the stuff that came out looked like silver tooth paste, also the ammount of grease on the wipers is very minimal,ie: almost dry, I ran the truck for another 300 miles and drained again this past weekend and same thing not quite as thick but it wasn't just gear oil, the other thing that scares me is the large chunk of metal that came out on the second drain, it is big enough to barely fit on a nickle, i have been changing my diff oil with every oil change for the past year that i have owned the truck and it has been fine up until now, any ideas or does it have to be an inner seal gone bad, oh yeah 92 cruiser, front e locker, 195,000 miles, sees lots of trail miles, TIA Brad. ???