WHATS UP GUYS I HAVE A PROBLEM THAT JUST STARTED COMING UP.oK HERE IT GOES EVERYTIME I DRIVE I HEAR LIKE A WHIRRING SOUND COMING FORM THE BACK OF THE CAR I MEAN THE FASTER I GO THE MORE DAMN NOISE I HEAR,MY FREIND TOLD ME IT MIGHT BE A DIFFERENTIAL IF IT IS DO U THINK THATS EXPENSIVE WELL IT SURE SOUNDS LIKE IT IS.

check dif fluid. Could also be a wheel bearing.

I can almost guarantee it's a wheel bearing. Mine makes the same exact noise almost like a roaring noise as you progress with speed. This is how you can figure out which one it is. Drive it down the road and listen for it to get louder for which ever the side of the car is on the outside of the turn. So, for example if you were making a left turn and the the roaring got louder it would be the right wheel bearing like mine. The wheel bearings are another common problem on the LS so, I wouldn't get worked up yet. Good luck though.

Or jack the car and wiggle each tire, thats a good way to check if its the bearing. The tire should NOT wiggle when you try to move it. On my eclipse one wiggled and bearing was just done, hopefully its not that bad.

mine does the same thing. turn the music up :) mine only does it when i let off the gas.