Whining/Whirring Noise On Overrun

[Lee S]

Hi Joe. Sorry, yes. Updated OP with new bullet points. 78k. Agree. Need to get someone to look at it before something goes pop. Its not looking very promising if the noise goes completely when in neutral is it? Surely that means all of the drive-train (diffs, CVs, transfer box, prop shaft, wheel bearings, etc) is all still moving and all I have done is remove the gearbox/TC from the equation?

[Delboy]

On a deceleration run the and gearbox in normal operation it would allow some degree of engine braking by delivering torque to the engine would it not?

If my understanding stands true then extra load would be applied to all the other components as against to a in neutral test.

[Turbo Tony]

When it stops at around 10 mph, check your driver info display to see if that matches the time the gearbox is shifting down to 1st.

[Lee S]

Originally Posted by Delboy

On a deceleration run the and gearbox in normal operation it would allow some degree of engine braking by delivering torque to the engine would it not?

If my understanding stands true then extra load would be applied to all the other components as against to a in neutral test.

Very good point Del, yes you're correct, so it could still be something like a dodgy CV joint (he says hopefully...)

[Lee S]

Originally Posted by Turbo Tony

When it stops at around 10 mph, check your driver info display to see if that matches the time the gearbox is shifting down to 1st.

I will check that Tony, yes, but I think it doesn't shift down to 1st until really low, like 5 mph or something, maybe even lower. I will try it tomorrow to see. I have done about 180 miles in it over the weekend and to be honest it doesn't seem to be getting any worse. Looking back, it seemed to have started around the time of that really really hot weather, when it was about 28-30 degrees for a couple of days. Maybe coincidental. It's just been in for a longlife service and a couple of other odd jobs to Audi and they didn't comment, so we will see. Thanks all.

[Lee S]

It's still in 3rd (sometimes 2nd) when slowing down to 10 mph and only really drops into 1st if speed is like 2 or 3 mph or I stop. So 10 mph is not really related to a specific gear.

[MikkiJayne]

The behaviour sounds like the prop centre bearing, but the mileage is very low for that to be happening.

[Pug]

Did you ever get to the bottom of it?