canical

It was OK when the tyres were new. Hankook. No uneven wear. I'm starting to think wheel bearing again, but no noise or binding when I jack up and spin the wheels by hand. Wooo noise starts at about 20mph and peaks at 60 mph. How can you tell which side to change?

Thanks for responses . I presume that the differential gear bearings are lubricated by gearbox oil and that the "gearbox side" driveshaft bearings are sealed units? I am just trying to anticipate the eventual failure mechanism. Presumably if the bearings are well lubricated (ie those in the gearbox) I could drive on and live with the wooo noise for tens of thousands of miles; but if the problem were a dry bearing (ie on the drive shaft) we are talking of only hundreds of miles? Any easy way to determine whether it is diff or drive shaft without taking things apart?

Fabia Estate Mk1 Elegance 1.9 TDI manual, 100k miles. For last 10k miles, I've had a roadspeed related wooo noise which drowns out the engine by 60 mph. All discs and pads were changed and calipers were free, but the noise is only marginally better. No noise change when I declutch. No noise change in turning left or right (so not CV or wheel bearing?) No particular resistance in the drive (engine is powerful 100hp anyway). Do people think this is the driveshaft bearing at gearbox end, or a shaft within the gearbox or something else? Alternatively does Fabia have a particularly resonant drive chain? Thanks.