2004 Mountaineer Noise and Issue
I have a 2004 Mercury Mountaineer Premier that just turned 112,000 miles. It is the AWD with the 4.6L.
The problem that I am having is a wub-wub-wub sound that increases with speed and gets louder when turning left (initially it was only heard when turning left, now it is slightly noticable when driving straight as well as turning left). It is not the classic "clicking" sound of a bad CV shaft but a wub-wub that increases with speed as well. It seems to be coming from the front left or center of the vehicle (sound is really only noticable from inside the vehicle). It has gradually gotten louder over the past few weeks. Both front wheel bearing hubs were replaced about 6 months ago and the left rear wheel bearing was replaced about a month ago. The brake rotors do not appear to have any warping in them and they are not rubbing on the dust shields (all four replaced a little over a year ago). Tires are newer with about 10-15k miles on them.
In addition to the sound, over the past two weeks the ABS has been going off occasionally when moisture is on the roads (however it will not throw a code for me so I can get it checked with a scanner) and yesterday and today the Advance Trac dash light would blink occasionally and it would adjust something as I felt it engage when driving straight (on dry pavement) which is new. The Advance Trac light would not stay on, and the system would only engage for a short second and then everything would go back to normal. My wife did state that a little over a week ago it did throw an ABS code (where the dash light came on and stayed on) and then the AWD locks out and the Advance Trac shuts off automatically until the ABS light went out (when she restarted it later in the day coming home).
Thank you for any help as this noise has been drving me nuts for some time now.