Just got back from touring the Spanish Pyrenees (they've got this red stuff you are supposed to drink - Rioja or something like that - it was hard but somebody had to do it). It was very hot - 38-39ºC and lots of tight hairpins. When the car and transmission was really hot I got this rubbing grating noise from the back of the car when going around tight corners (there were a lot) either left or right turn. It has steadily got louder. There is nothing obvious to see inspecting the back axle, U bolts, Panhard rod or anti-tramp bars etc. No slack in the wheel bearings. Nothing loose.
Only happens when the car is very hot. Something wrong with the differential perhaps. Have you knowledgable TMers any suggestions?
