Question about 2009 Pontiac G8

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STEERING WHEEL SHIMMY

At highway speeds - 55-70 i am getting a steeering wheel shimmy even though all wheels are properly balanced. The vehicle has 8500 miles and problem started after wheels where rotated at 7500. Good Year claims tires show no flat spots and wearing evenly. 2 Pontiac service dealers are stumped and state no bulletin regarding this type of problem has been issued by Pontiac-GM. Please provide advice on how to correct this nagging problem.

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  • pc302001
    pc302001 May 11, 2010

    Did they check the tires to see if the a belt broke? Were the wheels removed after the initial tire rotation? Were they tightened down all the way?

  • Anonymous Mar 27, 2014

    Steering wheel shimmy. More pronounced at lower speeds

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I had a 2008 Supercrew that had that prob. One of the tires was defective. It balanced ok but at speed would vibrate. The dealer sent me to Discount Tire. They have a machine that will detect problems like yours. I don't remember the name of the machine. Have your dealer take it or send you there. I would think Goodyear would have the same equipment but maybe not. Good luck!

Posted on Feb 10, 2009

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Help


Uneven tyre wear can only really be caused by either worn suspension or steering components, or wheel alignment angles incorrect. The best way to check this out is to get a wheel alignment carried out by a reputable specialist, as they will (or certainly should) go over your suspension and steering first to make sure there are no faults before they reset the wheel alignment. The other thing to note is that if the uneven tyre wear is bad enough the wheel alignment won't fix the wear problem, just slow it down.
The shimmy could be caused by a couple of things (driveshaft out of balance, tyre fault, wheel balance) but the best thing to do initially is get the wheels balanced first and see if that fixes the problem, and then go from there.
The same company should be able to both the alignment and balance, and these jobs should both be done periodically (at least whenever you replace tyres) to improve tyre life and make the vehicle easier and nicer to drive.

Hope this helps,
Mark.

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