Rear end noise

OUTLAW said

need a little more info ....is it a whine? or a snapping noise ? ...or a clunk? is it there when you accell or decell?

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it's there on accel, cruising and decel, although it sounds louder on decel.
I'm ruling out, for now, ujoints since it's a new driveshaft with new joints.
It's an open ended rear, 3.23 gears.