Hi,

I get this wierd sound while driving my truck, at low speeds its not
noticable, but at higher speeds say 30+ mph it gets louder and more
noticable. Anyway it sounds like its coming from the front driver side
tire, its sounds like a tire with a flat spot, but I inspected and
rotated my tires and it made no difference.

It sounds like "whomp-whomp-whomp-whomp" running at 2+ hertz. I had it
into the shop, they replaced the tierod ends and pitman arms. But as
soon as I got it back on the freeway, "whomp-whomp-whomp". I'm not
sure they actually test drove it before or after they fixed it.

Anyway the sound started a few months ago and seems to be getting
worse. I thought maybe it was the wheel bearing or possible rotor run
out. Any other ideas?

thanks