I have a 1993 RRC with the BW transfer box, I know what happens when the viscous coupling unit siezes and you get wind up. The question is does anybody know what are the first signs of the viscous unit starting to fail, the reason for asking is that I have some strange noises occasionally that sound a bit like something rubbing or dragging. I have checked the handbrake is not dragging and wheel bearings are all ok. I am open to any suggestions to as to what the noise may be if it is nothing to do with viscous.