Help - is this a wheel bearing going out???

[87Blue325iC]

Ok - I have a high pitched sound coming from the driver's side (I think) of the car that is driving me crazy. I suspect a wheel bearing, but I had the rear passenger side wheel bearing go bad last year and this is a different sound. Here is what is happening:

• I just replaced the driver's side rear wheel bearing last night - and the sound is still there! Pass side rear bearing replaced less than 12 months ago.
• Sound is high pitched -almost like a fan belt adjusted wrong but not so "screetchy"
• Dependent on wheel rotation (doesn't happen when the car is stopped)
• Comes and goes at times
• Starts at about 10-15 mph but doesn't get really loud the faster you go like you would expect from a wheel bearing.
• Sometimes the sound stops when in motion - but usually only for a few seconds then it comes back.
• Cannot seem to see any correlation to when I turn the wheels.
• Haven't noticed any vibration

Planning on replacing the front bearings - but don't want to spend the $$ if it is something different I am not thinking of. Could it possibly be the center driveshaft bearing? Thoughts?

[87Blue325iC]

Anyone?

[SpasticDwarf]

not a clue, but I hope you get it sorted out.
bump for someone who needs some help :)

[Mastrcruse]

Just throwing this out there since I have no clue. Could it be the LSD going bad? Some of those symptoms make me remember a thread about someones LSD going bad. Sorry for not being much of help.

[PiercedE30]

maybe the metal protecting plate behind the rotor rubbing against the rotor as it spins..........

[87Blue325iC]

maybe the metal protecting plate behind the rotor rubbing against the rotor as it spins..........

Thought of that - but the sound isn't a rubbing sound, but I checked the plates anyway and they clear.