[rawedge2]

You need to have the Diff Fluid Service Bulletin Performed as stated above.

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I went through a similar situation after installing Springs/spacers thinking i was rubbing. I switch spacers, then realized it wasnt that and had the e-brake cable looked at thinking that could be getting caught up some how..

The way you describe it is spot on. It would sound like a moan, it would slow the cars speed when it occurs, Happenening at low speeds in a turn without the wheel at full lock..

Also it would be more prevelant while the diff fluid is cold.

Get the bulletin done, give it a few miles to work throughout the diff and you should be all fixed.