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Old 02-01-2006, 04:36 PM
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Which Auburn gear posi?

I just purchased a Auburn Gear Posi on Ebay. It came out of a 1987 Suburban. It looks brand new. It is a 10 bolt 8.5 " 28 spline. I tried looking up which one it is. There are two types. A professional and a pro series. Does any one know how I could tell the difference? Check out pic. Thanks
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Old 02-01-2006, 10:39 PM
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The difference between the two is going to be in the amount of torque required to slip the clutches. If it gives you a lot of tire scrub, then it is the pro model. I have driven Subs with the posi diffs, and they don't give a lot of tire scrub. One note, make sure you soak this unit in PURE friction additive for at least 24 hrs prior to installation. This is a MUST! MUST! MUST! do, if you do not, then you will have a royal me$$ on your hands, and a new boat anchor for your fishing boat.
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Old 02-02-2006, 06:30 AM
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Might contact someone at www.auburngear.com and see if there's any way to tell visually which one it its. Maybe a color code or something like that.
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