HELP!! The rear differential has been whining on my 5spd 91 230TE for a while, but I could live with it. It has suddenly started rumbling badly in any gear over 30mph, especially when accelerating. Assuming the 'diff is the problem, anyone know where I can get it rebuilt / sorted in Sussex (I live nr Brighton)?? I've heard a rebuild could cost £550 - is a secondhand diff an option?? Would REALLY appreciate any advice asap as I need the car every day[/b]