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#4517087 - 09/15/17 01:40 PM '09 Impala with steering shuddder /noise, lo speed
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 706
Loc: Canada

Hi all!

Just got some weird noise, shudder, clunking & shimmy in low speed 90 degree turns only, like into a parking space!

Car is '09 Impala 3.5L V6 140,000 miles (227,000 Kms)

Just checked:

- PS fluid OK level, no foaming, no leaks (not flushed)
- Serpentine Belt looks good, tight, no cracks
- Tire pressures OK
- Lug nuts OK
- no loose Tie rods (jacked up to check)
- no other loose suspension parts " "
- no wheel bearing noise


any ideas guys? searched for similar posts, found nothing.....

Thanks!

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#4517103 - 09/15/17 02:04 PM Re: '09 Impala with steering shuddder /noise, lo speed [Re: i_hate_autofraud]
Bgallagher Offline


Registered: 04/17/12
Posts: 3159
Loc: Boston, MA
what are the condition of the tires?
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#4517138 - 09/15/17 02:37 PM Re: '09 Impala with steering shuddder /noise, lo speed [Re: i_hate_autofraud]
Oro_O Offline


Registered: 09/20/14
Posts: 1352
Loc: Seattle-ish, WA
When you had it jacked up, did you rock the tires hard to check the bearings? Another possibility is the 1/2 shaft. I had an Audi that presented that way. It's one side only, correct? Because if it's both, then that's different (steering).

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#4517142 - 09/15/17 02:41 PM Re: '09 Impala with steering shuddder /noise, lo speed [Re: i_hate_autofraud]
bigt61 Offline


Registered: 02/12/13
Posts: 3117
Loc: Virginia
Tires, struts - at full lock, you have a lot of caster jacked in which puts more pressure on various parts and likely the tire sidewall as well. Does this happen equally going right and left? I would say the "turn in" side would be more stressed. You can try varying tire pressure to see if it gets better or worse - try it at 20lbs and then at 40lbs. Maybe that will give a clue. I know belts going bad in tires can cause all kinds of problems and have you chasing the wrong thing.
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#4518349 - 09/17/17 06:58 AM Re: '09 Impala with steering shuddder /noise, lo speed [Re: Bgallagher]
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 706
Loc: Canada
Originally Posted By: Bgallagher
what are the condition of the tires?



Thanks, Tires are good at 60% thread, rebalanced 18 months ago. no lumps or bumps, pressure at 32PSI

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#4518350 - 09/17/17 07:03 AM Re: '09 Impala with steering shuddder /noise, lo speed [Re: Oro_O]
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 706
Loc: Canada
Originally Posted By: Oro_O
When you had it jacked up, did you rock the tires hard to check the bearings? Another possibility is the 1/2 shaft. I had an Audi that presented that way. It's one side only, correct? Because if it's both, then that's different (steering).


Thanks, I lifted each side one at a time and rocked the tire top to bottom, then left to right.

Top to bottom had a little clicking, I'd don't recall having before, left to right was solid, new tie rod ends 2 yrs ago.

Turing the wheel had some play, didn't seem more then before.


I'll try lifting both sides and see overall CV play and everything all over again.

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