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Old Yesterday, 11:45 AM   #1
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2009 Excessive Front End Noise or Vibration

I have excessive noise coming from the drive train. To eliminate some of the usual suspects, there are a few things Iíve done but with no success. I just changed the wheels from winter to summer (this is a whole new set of rims/tires). Its had a 4 wheel alignment (they had to put in the rear camber bolts). Iíve taken it to a transmission shop and they gave the transmission a clean bill of health. None of this has helped with the noise.
With the engine running and parking brake set, I jacked up one front wheel and put the car in drive just to let that wheel spin free. There is a vibration/noise. As it is accelerated, there is more noise. I let that side down and repeat on the other side with the same result (this is why I took it to a transmission shop).
So now, Iím about to start replacing components, first thinking that both wheel bearings could be shot but each time I do this, it will be a $100 experiment.
Has anyone had this experience and if so, did you find the culprit?
thanks


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Old Yesterday, 01:11 PM   #2
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Moved to General Tech Chat.

Have youi done anything to isolate the noise from RPM dependent vs. speed dependent?
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Old Yesterday, 08:38 PM   #3
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Originally Posted by sailor View Post
Moved to General Tech Chat.

Have youi done anything to isolate the noise from RPM dependent vs. speed dependent?
If I rev the engine while in Park, the noise is not there. It only occurs when it's in drive and after ~10mph can you notice it, but it gets worse with faster speeds. I've not tried to repeat the noise going backwards.
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Old Yesterday, 08:49 PM   #4
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A quick way to determine if it is indeed a bad wheel bearing, pay attention when making a turn while driving. When if turning left the noise gets worse, a bad wheel bearing could be the culprit; and vise versa when turning right.
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Old Today, 01:00 PM   #5
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If you are simply jacking up car to have wheel hang in space you may easily get noise, the driveshaft is at a very severe angle like that and can easily damage it as you are running the CV joints out of the normal range of travel. Depending on how severe the ball slots inside them are worn the noise amount there. Yet axle could be fine and with plenty of miles left on it. The differential will have the wheel speed at twice what the speedo says too, 30 on speedo will be 60 on the one wheel realworld and dangerous to run car like that, can shred the diff side gears doing so.

Proper is to jack up car and then jack under control arm as well to bring axle close to level (with itself, not the ground) and then run car below 20 mph on speedo so no getting out of shape speedwise there.

Trans can work fine but diff side gears be still tore up if MTX and a hot rod foot on top of it.

Wheel bearing noise often changes better/worse with cornering as said. Could be the pass side middle axle bearing too.
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