Bullheimer, I had a rear differential fail on an antique car I bought 8 years ago. The cause of the failure was hardened LubriPlate white grease on the thrust washers. It had been sitting for years, immersed in gear oil, yet had still set up. Had to rebuild the entire rear end and replace sheared off pins, etc. (Model T Ford). I broke a window regulator on my '65 about 25 years back when I went to roll it down with hardened lubriplate. (I'm older now, and would have dis-assmbled it before forcing it nowadays!) The ONE thing lubriplate is good for is battery cable terminal anti-corrosion protection.....and that's about it. It sticks like glue, won't dissolve in oil, and hardens into a plaster like protective coating. Great for battery terminals!
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Jeff 
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