Nick C

I have a nice 2005 Audi A4 3.0 Cabriolet Auto with 60k miles and in the last couple of weeks I’ve been getting a whining noise from the engine once I’m above 40mph and accelerating. My local garage in Birmingham say it’s the differential (fluids are fine) but it is not a job for them, lack of parts they say. Can anyone help or point me to an independent garage who might help please. regards, Nick