<br>The singing comes and goes, but I first noticed it a few days ago. When I would coast in a certain speed range (10-15 MPH), I would hear a harmonic sound probably around 440Hz and loud. The pitch was not tied to speed (either engine or road) and stayed constant throughout. Today I also noticed it again as I was stop 'n going around town at low speeds. <p>Given that is not tied to speed, I'm thinking possibly steering related. Almost sounds like when I went low on steering fluid last summer, except that all the sounds now are happening in a straight line. <p>Any ideas?