So, after my car came back from insurance repair, I noticed that the AYC was being very loud going around slow tight corners, like roundabouts. It seemed to squeak like a squidgee on a window on right hand turns, and creak and clunk on left hand turns. Using the guide here, I change the fluids inside the diff and AYC reservoir (GL5 and SP3 respectively) to see if it would make a difference. Well, yes and no. At first, it still kept making exactly the same noises, and even going around a roundabout made the AYC gauge light up like a christmas tree. Then the little red AYC light came on, my christmas tree went totally dark, and there were strange sounds no more. What does this all mean? Did the diff realise that it was fucked so it just turned off the AYC system and is functioning as an open diff? And should I start looking for a new one?