Edmunds Answers

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  • laltazan 05/31/11 7:42 pm PST

    If the tires are known to be round and balanced correctly, try checking a few things. First, does the vibration get better, worse or stay the same on acceleration and deceleration? If the vibration changes, drive line vibration is more likely. Remove the drive shaft from the vehicle and move the U-joints in both planes. They should move glass smooth, not binding or tight spots. Also examine the shaft very closely for any dents or marks. No matter how slight, these will affect drive shaft balance and cause vibration.

    If the vehicle has been lifted, drive shaft angle is also critical. If acceleration and deceleration have NO affect, I would suspect a tire/wheel issue. Possibly a bent wheel or even a bent axle shaft.

    Source: http://www.agcoauto.com/content/news/p2
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  • MrShift@Edmunds 05/31/11 7:44 pm PST

    Well if the vibration can in fact be "driven through", that is, doesn't occur below or above a certain speed, then it is almost certainly wheel balance or rim trueness issues.


    If on the other hand it starts at a certain speed and stays there no matter how fast you go, this could be a driveshaft issue (frozen u-joints, driveshaft balance weights broken off, etc.)


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