Question for those who have or had the 60-75 mph shimmy - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-03-2007, 12:10 AM   #11
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Mine comes and goes as well. Mostly 'goes' as it usually isn't a problem. Every once in a while though, it drives me crazy, and I can feel it. I've learned to live with it.

My car needed new tie rod ends a while ago, and they made the problem leave for a good long time, but I've felt it a few times (on the same road that was smooth the day before - mind you) since then.

I almost attribute my shimmy to the weather as it is so random...
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Old 11-05-2007, 03:53 PM   #12
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I just thought I would add to this thread that checking your tire pressure is a must. My pressure on all 4 tires was down to 26 psi and I bumped it up to 33psi....and the vibration is 90% gone. Just something to try to anyone reading this thread.

Also, as others have mentioned, the Hunter GSP9700 is a great machine for balancing tires and would be the only machine I would reccommend for the Bonneville/Lesabre/Aurora

Chris
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Old 11-06-2007, 03:14 PM   #13
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As mentioned earlier, I'm on RSA'* and my shimmy goes away around 80mph. Which is nice for the ride and i get places pretty quick, but doing 25 over on the highway is frowned upon by State Police. Once my RSA'* wear down i want to get some better tires and see if that helps at all.
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Old 11-08-2007, 08:33 PM   #14
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I dropped the car off today with a list of things. When I called to set up the appointment yesterday I ask my service adviser (Kevin) about this tsb, pointing to the end links. He started saying that this hasn't been proven be a fix for the issue and that GM won't allow them to throw parts at it on their dime. OK, so I figure I'll have a conversation with him when I get there.

When I got there I was supposed to take a ride with the mechanic (Chris), but he had another road test to go on first with another customer. 45 mins later, when they got back, the guy'* wife wanted to go with him on the road test. Why didn't she go with them on the first ride??? I couldn't wait any longer so I went to talk with Kevin. I told him I couldn't wait any longer and I ask him again about this tsb. I said can you explain what this is about again. He said it has to do with more than the lower control arms, that everything would need to be checked. I told him I had already spent around 1400 dollars trying to fix this problem. All but 100 was spent at this dealership and I don't know how much more my budget can absorb in trying to fix this, that I hope this warranty I spent 1900 dollars on will help in some way.

AT this point I am waiting to here what they have to say. He did say Chris knows a lot about this issue and he knows what to look for. I do know Chris through my neighbor, he has done some side work for me before. I hope he can help with this issue. I wish he was the one that looked at it first.


Here'* my list of problems I'm having him look at

* Oil leak -either valve cover or intake, I'm not sure
* Service Stability light
* Noise in the steering - when turning left at speeds around 50mph, almost like a humming sound.
* Intermittent moan squawk - (still exist) even after the new steering gear that was replaced a few months ago.
* Vibration 60-75 (still exist)
* Drivers door window- noisy when rolling down but not up
* Harsh shifts- at slow speeds, it shudders in and out of gears (1-2, 2-1), really noticeable when driving in parking lots. It does between accelerating and braking
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Old 11-09-2007, 12:23 PM   #15
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I have the same vibration. Had it with old RSA'* on the car, still have it with my NEW Michelin MX4V Energy Plus tires. I just live with it and avoid those resonating speeds if at all possible. If someone ever gets this fixed permanently, let me know..........I'm tired of this annoying, time/money wasting issue!
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Old 11-11-2007, 04:27 PM   #16
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Update so far.They are still looking into the vibration issue. They are not willing to throw endlinks on it yet, I'm not sure if they even will.

As for the other things mentiond

* Drivers door window- noisy when rolling down but not up
(They replaced the winow regulator)

* Service Stability light
(They replaced the Steering Wheel Position Sensor)

(No word yet) * Oil leak -either valve cover or intake, I'm not sure
(No word yet) * Intermittent moan squawk - (still exist) even after the new steering gear that was replaced a few months ago.
(No word yet) * Vibration 60-75 (still exist)
(No word yet but they did here it) * Noise in the steering - when turning left at speeds around 50mph, almost like a humming sound.
(No word yet but they did feel it) * Harsh shifts- at slow speeds, it shudders in and out of gears (1-2, 2-1), really noticeable when driving in parking lots. It does between accelerating and braking.
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Old 11-11-2007, 10:32 PM   #17
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Most vibrations at this speed relate to the first critical rotational speed of your tires.
This could point to an imbalance.
Not all balances are done properly. A tire should be balanced in two planes with weights added to this inside as well as the outside. A simple static balance will not accomplish this.
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Old 11-12-2007, 02:04 AM   #18
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Quote:
Originally Posted by 2000SilverBullet
Most vibrations at this speed relate to the first critical rotational speed of your tires.
This could point to an imbalance.
Not all balances are done properly. A tire should be balanced in two planes with weights added to this inside as well as the outside. A simple static balance will not accomplish this.
Is a Road Force balance different than this?
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Old 11-12-2007, 02:28 AM   #19
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Road force balancing is an excellent method of balancing.

http://www.redwoodgeneraltire.com/balance.htm

All to often the tire and wheel will be balanced properly and then is not bolted to the hub correctly causing runnout and hence vibration.
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Old 11-12-2007, 02:37 AM   #20
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Quote:
Originally Posted by 2000SilverBullet
Road force balancing is an excellent method of balancing.

http://www.redwoodgeneraltire.com/balance.htm

All to often the tire and wheel will be balanced properly and then is not bolted to the hub correctly causing runnout and hence vibration.
I did have that done already and it didn't help. I ask because I wasn't sure if what you were talking about was any different.
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