Quote:
Originally Posted by Sheepdip
I run Lucas Full Synthetic 75W-90 in both my rear end and manual gear box.
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Full synthetic oils contain no sulfur, any sulfur would be introduced via bio additives that contain sulfur.
I have been using Lucas Full Synthetic Gear Oil in all of my rear ends and manual transmissions practically since it came out with never a hint of a problem, superb performance.
Common to all synthetics that claim no posi additives required... I will call B.S. on that in my personal experience, I always add a tube and I have found the MOPAR to be the best.