I have a Auburn Gear LSD. I was using some of the Red Line high shock synthetic lube and the LSD did not like it. Lots of chattering and bad noises.
Replace with 80W90 dino oil and 6 oz. of friction additive and it is quiet and smooth as can be now.
From their web site -
The Auburn Gear limited-slip differential design has been extensively tested with high quality non-synthetic 80W90 hypoid oils treated with GM or Ford friction additives (3 oz. of additive will treat 1 quart of oil). To avoid differential clutch chatter (noise) and for optimum performance, use the
oil and additive described above. Use of other additive and oil types may cause differential clutch chatter.
Ford Part Number: C8A219B546A
GM Part Number: 1052358
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