I have a noise coming from the front end

2004 PONTIAC GRAND PRIX

97,000 MILES

GTPCOMPG

MEMBER
3 POSTS
FOLLOW

I have a whirring/fast vibration noise coming from my front right when the car is going over 20 mph. The pitch changes with wheel speed but not rpm. The sound is not affected by steering. The transmission was replaced right after the noise started but did not affect it. The brake rotors and pads as well as the hub bearing have been replaced, but the noise is still there. It is not coming from the alternator or the steering pump. I am completely out of ideas because nothing looks obviously damaged or worn.

Oct 1, 2011 at 11:28 PM

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JACOBANDNICKOLAS

CAR REPAIR CONTRIBUTOR
110,190 POSTS

Wow! You checked basically everything. Check to make sure the backing plate behind the rotor isn't rusted and rubbing the rotor. Also, are the tires worn evenly? Are you sure the hub bearing wasn't over tightened?

Oct 1, 2011 at 11:35 PM

GTPCOMPG

MEMBER
3 POSTS

Backing plates were replaced with the rotors. Tires and rims were replaced the same time as the brakes. Everything was tightened by torque wrench to factory specs.

Oct 1, 2011 at 11:44 PM

JACOBANDNICKOLAS

CAR REPAIR CONTRIBUTOR
110,190 POSTS

Does the noise change with vehicle speed or engine speed? You've replaced everything. It has to be something on the engine.

Oct 4, 2011 at 3:22 AM

GTPCOMPG

MEMBER
3 POSTS

The noise changes with vehicle speed not rpm. My next step is to tear down the entire front end again and replace everything else that has not been replaced.

Oct 4, 2011 at 6:21 PM

JACOBANDNICKOLAS

CAR REPAIR CONTRIBUTOR
110,190 POSTS

What haven't you already replaced? It sounds like you hit everything.

Oct 4, 2011 at 9:13 PM