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01 GPSE 3100 Speed Dependent Hum

A

AJ1G

New member
My 01 SE with only 80K has started to make an audible steady low pitched buzzy hum that increases in pitch/frequency with road/tire speed, sounds like its coming from the front of the car somewhere low. Comes it at low frequency about 30 MPH, just keeps going up in frequency directly with road speed from there. Does not change under braking, putting engine in neutral, or when changing gear loading from acceleration/slowing except for the frequency change with speed. Not affected by turning. Not a brake scrape. Universal joint or the inner end of the halfshafts? Low brake pad thickness warning device noise? Wheel hub bearing? Something involving a rub with an ABS wheel speed sensor? A tone caused by air flow over the front of the car somewhere? The car has had some sort of a speed sensitive "flow tone" of a different pitch that pops in around 50 MPH, but the hum is something else new. Seemed to come out of nowhere in the last day or two, doesn't sound like anything is about to break, but has me concerned.....

Best way to describe the character of the sound is a that of a small plane's propeller flying overhead, kind of a buzzy drone.

Chris, Stonington CT
2001 GP SE 80K
 


So it's most likely a bad wheel bearing. A coworker just had the EXACT same thing happen on his son's GP of about the same vintage, made the exact same noise.
 
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