I have 5.4, 4X4 which I owned since new. I recently started to hear what sounds like a nail or rock stuck between the tread on the tire. Faster I go, more frequent it becomes. The sound is coming from the front passager or rear passager side. The sound is not apparent in city driving, but on freeway it's noticable. I now have 29,000 miles on it. I am still under factory warranty, but like to have some idea before going into the dealership.

 

Did you happen to look and see if it was a nail or rock??????????

 

I've checked and found nothing. It sounds and feels like the tires have a flat spot on it. I am just worried that it may be related to bearings or something...One thing I've noticed over the last month or so is the fact that I am losing air in the back. I would put 35 psi, 2 weeks later it is down to 27 psi. It may well be a tire leaking. I am just concern. What else can it be.

 

First, make sure your not running over the reflectors on the road, lol. j/k. I dont know what else it could be, but you might want to replace one of your passenger side tires with your spare tire. Try both tires and see if one of them solves the problem. If so then the problem would have to do with your tire. I highly doubt loosing that much air would have ne thing to do with it. I've been to the point where i was having to air up my tires every day b4 school, and never came across this problem.

 

Thanks for the tip, I will try that spare tire trick to see if that will solve it. I'll let you know what happened.