Loud humming noise while driving?

[Guest jkimes]

My pathy is making a loud annoying humming noise that is always there as long as im moving. I replaced the right front wheel bearing thinking it was the culprit (I already replaced the front left one two months ago), but the noise is still there. It quiets down if I turn the wheel to the right, but as long as im going strait down the road at any significant speed it is really noisy. My front tires are pretty bald on the outside edges (bad alignment?) but otherwise they look decent. Is this noise just bad tires or could something else be causing it?

[vengeful]

If the outside edge of your tires is worn down, your camber is out of spec. Get the truck aligned. Also, with a bad alignment, this could cause the tires to wear unevenly, creating the noise that you're experiencing.

 

My instincts tell me - from your description - that your tires have become very poorly worn due to a bad alignment, and that is creating the humming noise that you're hearing. Same thing happened on my dads car. I told him he needed new tires because of the noise and he goes, no the tires still have plenty of tread on them. I also told him that he needs to rotate the tires ever 5,000 miles and have an annual alignment check done. He goes...whats an alignment have to do with a car? -thnkboutit-

[mws]

I agree with venge - the excess wear on the outside edges is telling you that you have an alignment issue although I think excess toe-in is the more likely candidate. Regardless, once a tire is worn funny, it will never be the same and is prone to noise. Especially if the tread blocks are showing any signs of feathering - where the tread blocks are sawtoothed looking, with the leading edges more worn than the trailing edge. The face then slaps the pavement. Many slaps per second is a hum sound.

 

So get a good alignment, and then put your rear tires on the front. If the noise is gone, then replace the badly worn tires.

[Slick]

once you change your front tires. and had an alignment, and have checked your wheel bearings, check the gear oil in the rear diff........