Is it true synthetics w/o adding additive are ok to use with posi? MY unit is a fresh 12 bolt build with zero miles. I don't want to screw this up. Is there one fluid I should use for break in, and another for after that?
After I put a new Eaton posi unit in my 68, I called Eaton and asked them what was best to use. I'm having brain fade and I can't remember what they told me, but they will tell you. They make the units, they will know whats best. Try this too..Scroll down to Eaton posi....http://www.eatonperformance.com/differentials/diffs_FAQ.html
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