2004 Outback 2.5 Auto Possible issue, advice wanted

[BenjaUK]

Hi all, new to Subaru.

Wanted Outback or Forester for quite a while now, finally got hold of this outback (replacing a broken Volvo v70).

Just did a motorway stint in it and there is a feint, intermittent high pitch whining noise, seems to be only at motorway speeds and very quiet - can only hear it if the radio is completely off.

diagnosis:

only audible on motorway/at motorway speeds

I tried switching to neutral at high speed and i think it stopped but not sure

I couldn't work out the circumstances that made it appear as mostly it wasn't there (accelerating/decelarating/cruise/uphill/downhill/etc.)

its a low mileage car (48K ish).

Any ideas welcome

Thanks

Ben

[BenjaUK]

Thanks very much for the reply, sorry for late reply - I gave up checking!

I think I have checked the gearbox dipstick but haven't looked for the front diff. will check over tonight

Ben