Re: Help !!! 2008 Ford Edge Limited
Do you have AWD? If so, it might be something to do with the AWD system. I am saying this because I had an issue with my 2008 F150 that sounds similar. Granted, the 4x4 system of the F150 is different than the AWD system on the Edge, but there may be some similarity in components between the 2 systems.
In my situation, I started hearing it around 15,000 kms and it was isolated to the front left wheel. Generally, when the windows where up and the radio was on, I could hardly hear it but when the driver's window was open, it was quite loud. Especially when the sound was reflected back, say by one of those concrete barriers they use to separate lanes in a construction zone.
The only way I found to make it stop was to a) bring the vehicle to a complete stop and turn the steering wheel back and forth, lock to lock (very impractical when you are driving on the highway) or b) to turn on the 4 wheel drive switch and turn if off again (also impractical when you are driving over 80 kms/hour).
Anyway, after several frustrating visits to the dealership, they were unable to find anything wrong and could never get the truck to actually make that noise. So I made sure they logged my complaint on the work order at each visit and I started to research this issue on my own.
Finally, after much reading and posting on forums like this, I received a response from a mechanic who told me to have the dealership check the vacuum signal and 4x4 control valve. So I printed out the thread and took it to the dealership and, voila, problem solved!
Hopefully this information might point them in the right direction. Good luck and let us know how you make out.