Gee, thanks.
Today I decided to find out why the rear end is leaking on my old 4WD. Well, I found it. Apparently the idjit that owned it before me can't read directions. When replacing the pinon bearing, one must always use a new pinon nut, or risk having it back off. Well, this person DID reuse the nut (the red loctite was a dead giveaway), and the nut backed off just enough to let the bearing and slinger come forward, pushing the seal forward as well. Yay, now I get to put a new crush washer, bearing, slinger, seal and NEW PINON NUT on. At least no damage was done while the bearing and slinger were banging around in the housing. Bearing cup looks good, no damage to the shaft, and none to the yoke. And I found no metal shavings when I pulled the back cover off and drained the pumpkin. Whew. It could have been a lot worse, but not exactly how I wanted to spend Sunday. Good thing I like turning wrenches 
Of course, everything else leaks too. It IS a 4WD after all. Next project, new output seal on the transfer case......yeah, it's leaking too
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