Question about Pontiac Grand Am

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All of a sudden will hear roaring sound and vibration thru entire car. noise gets louder. this was only at interstate speed, today at around 45. more vibration when i break. changed rotors, pads, calipers, cv joint bearing, wheels balanced, replaced 1 rim because i thought it was warped, new front hub bearings, seems like a frequent miss at running speed, no miss when ideling.(but may be binding)new plugs, wires, pcv valve, air filter, fuel filter. today when noise and vibration started when i hit the breaks, vibration and noise stopped.cannot duplicate this. is very random. please help. i have tryed everything that has been reccomended to try. 2004 grand am...

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Check ball joints, tie rod ends, inner and outer. sway bar links and bushings. shock mounts (bearing plate). control arm bushings.

Posted on Jun 06, 2010

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