Bishop1

No it was a different Audi main dealer I just got the car back, the noise is a lot quieter now and the sound now starts from bout 40mph+. Where as before you could hear it from 20mph. Going to take it to another Audi tech. He said he’s gonna go through everything and try and diagnosed the issue

Thanks for your reply. I’ll try and work through ur list. as for tyres. There Michelin PS4s all round with 5mm on the rears. Had an Audi service few months back there said tyres are fine. So I’ll check the rest of the list.

I took it Audi and the diagnosed a faulty rear diff. Then I took it to my local mechanic who said he didn’t trust Audi and done his own diagnostics and said it’s a faulty rear diff. Changed it last year most of the sound went away. A year later it’s back worse than ever. Took it to a new garage they diagnosed rear diff too. And changed it for another one. And the sound is still there. Now he’s saying he can’t pinpoint where the sound is coming from. so 3 different mechanics diagnosed noisy rear diff. It’s now on its 3rd diff. And still whining. They said it’s not the rear wheel bearings. So at this moment it time I’m at a complete loss. Only thing is both diff jobs were mostly covered under my aftermarket warranty. So not really out of pocket more than a few £100.

Hi Alan, did you ever find out what the issue was? I’ve got the same issue. I’ve replaced my rear diff but still the same.