Snake, is this with the rear end FRESH? I know you said it's been rebuilt. If it's still fresh though, I agree with the figure eight recommendation. Doing that breaks the clutches in and allows them to kinda break the new surface so the gear oil and friction modifier can get soaked into them real good. Even after it's broken in, it's not uncommon at all to hear and feel the clutches breaking loose around turns, especially if it's a good tight unit.