i have 96 850 t5 manual and yesterday i noticed a strange whiring noise when driving the car feels fine and no noise when parked with the engine on just when i get to about 30 i hear it its not loud so i don't know if its always been there and i have just noticed but i always hear it now and it doesn't seem to get louder from 30 to 60 and the the noise stays the same. any one have any idea on what it might be

 

If it go/changes-pitch with wheel speed, then possibly wheel bearing or trans output shaft bearing.

Does it change if you put it in neutral and let it coast while driving?

Does it change when turning? etc.

 

John, John ?? Ya there son ??

Same questions as above.

 

sorry haven't been on lately. i jacked the car up and both from wheels span the same and both back wheel span the same freely there was slight noise from the brakes but think this was due to the car not being used for few days and slight coating of rust was on the disks. after driving it more i noticed it does seem to get slightly louder from 30 to 60 after 60 my exhaust makes to much noise lol not sure if it changes round corner but its no different with the clutch in or out. whats the worst it could be?

 

Bad wheel bearing that fails and allows the wheel to fall off and you to veer into oncoming traffic.




You asked !!

 

lol that is bad, i don't know how to find out where the noise is coming from it hasn't got any worse in a week ill just keep listening to see if it gets worse

 

Wheel bearings are usually slow to show their failure and can take a while to get bad. When mine started going bad, I took a 1,500 mile road trip and it still wasn't real bad when I got back.

 

i have recently had the o/s/f knuckle replaced or hub carrier not sure of it real name was a genuine volvo part could it be some thing to do with this my old one had a crack where the bottom ball joint sits in the knuckle/hub carrier.