Could be bad shock struts.
Jim Knox, 91 Dak
----- Original Message -----
From: "Robert Schultz" <not_robert_schultz@yahoo.com>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Wednesday, July 19, 2006 10:42 PM
Subject: DML: Help needed to find vibration
>
> Everyone:
>
> For the last three months or more, I've had a bad vibration or shimmy in
> my 00 QC 2WD. The vibration is felt through he steering wheel and at its
> worst the steering wheel moves up to 1/2" each way. It's bad enough that
> I really don't like driving the truck right now.
>
> I really started to notice it when I put new tires on the truck after
> the winter and initially thought it was the tires. They've been
> re-balanced and there doesn't seem to be anything wrong with them. As a
> test I switched back to the winter tires (235/75/15) on the front and
> the shimmy was reduced, but not gone. I suspect this is because the
> winter tires don't follow the road as well. The summer tires are Khumo
> Ecsta 255/50/17. These tend to tramline much worse, and the shimmy is
> worst when the road surface is poor. My theory is stiffer sidewall =
> more of the problem transmitted tot he steering wheel.
>
> I had the truck in to the dealer and they checked the balance (again)
> and replaced the lower ball joints (uppers done last year). The truck
> was aligned last year after installing the Hotchkis 2" drop.
>
> The odd thing is that every time we lift the truck to change the tires,
> the shimmy is reduced, and then returns. For instance, I jacked up the
> truck today just to check things, and then on the way to the dealer it
> wasn't too bad until I hit a depression in the road that compressed the
> suspension. Then the shimmy was back full force.
>
> I'm at a loss. It's going back in Monday to see what they can find.
>
> Any ideas would be greatly appreciated, so when the dealer blames the
> tires (aftermarket = bad) or the Hotchkis suspension (modification =
> bad) I have something to tell them.
>
> Thanks,
> Rob S.
> .
> .
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