Whir From Under/back Of Gs

[russtic]

Hi all,

I have a Series 2 '98 GS300SE on standard wheels. I've begun to notice a distinct humming/whirring sound from what seems to be underneath and to the back of the car, when I'm at speed. It's at it's worst between 40 and 60MPH, but probably only because wind noise begins to drown it out above that!

It seems to be related to wheel speed, not engine speed, and distinctly changes in pitch as I speed up or slow down. It's constant and seems to be getting slightly worse.

I should point out that it's not yet that noticeable, but these cars are so quiet that it's starting to bother me. I'm sure it wasn't there a few months back.

Things I think it might be are:

* Real wheel bearing(s)

* Prop shaft bearings

* Diff trouble

Can anyone offer any suggestions, or has anyone had a similar problem fixed? I'd like to research it a bit before taking it to my main dealer! (Recently had a big service so I doubt fluid/oil levels are to blame)

Lemme know!

Russ.

[ColinBarber]

lightly press the brake pedal, if the noise goes/changes it is brake related.

[88b]

Check tyre pressure and tyre condition

Never ever assume any garage has serviced a vehicle correctly ( 30 years in the trade has taught me this much ).

Could be a rear drive shaft CV joint.