Re: rear diff lube
For what it's worth, I been running the same Amsoil 80wt. gear lube and GM additive in my GM corp. Posi that I put in twenty years ago and no sounds, no problems.
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I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke!
IT'S NOT EASY BEING GREEN! -Kermit the frog
1970 Chevrolet C-10 Longbed Stepside :
350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes)
1996 Toyota Corolla (Parts runner)
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