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Old 10-01-2013, 08:16 PM   #15
kmcd
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Quote:
Originally Posted by CFD View Post
Kevin, if you bump it into neutral at the point of vibration does it go away? Reason being if it shakes when in neutral it would typically be a tire/wheel issue. If it only shakes under load it may be drivetrain related.
Hello, George. I've tried that too, but it doesn't make any difference. I'm going to lift it tomorrow and check for a defective tie rod, although I have a hard time believing that would be speed dependent.

It's good to hear from you, though. Are you still cranking out those shifters? I still say that's the best mod for the money on the L99.
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Old 10-01-2013, 08:49 PM   #16
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Originally Posted by kmcd View Post
Hello, George. I've tried that too, but it doesn't make any difference. I'm going to lift it tomorrow and check for a defective tie rod, although I have a hard time believing that would be speed dependent.

It's good to hear from you, though. Are you still cranking out those shifters? I still say that's the best mod for the money on the L99.

If it does it in neutral as well I wouldn't think it's drivetrain related although it is possible.

I still sell the shifters, it seems most like the pistolgrip although I still have some who dragrace who like the original shifter as it can be fitted with various switches for linelock, nitrous etc. I still use my original one myself.
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Old 10-04-2013, 01:04 PM   #17
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PROBLEM SOLVED!



Well, it turns out JusticePete and I were both correct.

The wheel/tire package was in balance (verified again on two different Hunter road force machines), but apparently the hub/rotor assembly was not. I finally solved the problem by rebalancing the wheels while they were mounted on the car to compensate for the problem in what turned out to be the front left hub assembly.

Using the current weights on the wheels as the 12 O'clock position, I added a 1/4-ounce weight to the already-balanced wheel at that position and moved it around the clock. I road-tested the car after each movement until the vibration finally improved at the 8 O'clock position. Then I added another 1/4-ounce weight at that position, and the vibration disappeared completely.

Thanks to everyone for your suggestions, and if there are other people out there with the same problem, you might want to give this a try.
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Old 10-08-2013, 08:32 AM   #18
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Mine does it too. Did it with the stock wheels and the ones i have now
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Old 10-16-2013, 09:13 AM   #19
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I forgot to mention that if you do end up balancing the wheel while it is on the car, you'll need to mark a stud and hole if you remove the wheel. This way, you can remount the wheel properly on the hub assembly again.
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Old 09-11-2014, 03:15 PM   #20
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I'm experiencing the exact same issue. Had the tires balanced countless times to no avail. But re-alignment seems to have made the vibration less noticeable. I'm right above 23k miles
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Old 09-19-2014, 05:25 PM   #21
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Wow, i have a similar issue on my Infiniti. I will try these ideas out for sure!
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Old 09-19-2014, 10:35 PM   #22
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Cool.
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Old 11-20-2014, 05:04 PM   #23
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My car vibrates consistently above 60 mph and I have had them road force balance twice now, last one being today and I still have the vibrations in the steering wheel. would you suggest getting them balanced while still on the car as well?
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