Is this an auto 4x4 type set up? A4x4, 4x4H, 4x4L? or is it 2wdr, 4x4H, 4x4L? If it's auto 4x4, I wonder if it has a viscous clutch set up in it like some FoMoCo where heat from shearing fluid within the clutch... caused by front to rear shaft rotational diffe... Login to read more.