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Old 10-22-2019, 01:26 PM   #43
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Well, the shaking problem is still there... as I thought. Just needed to get colder again (55 degrees this morning). Although less pronounced, the shaking is still there.


Now I've got to decide where to take it... I'm really starting to suspect a bad wheel bearing. More to come.... unfortunately.....
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Old 10-22-2019, 03:25 PM   #44
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In the past Ive had trouble diagnosing suspension issues, usually worn bushings/ball joints. The best way is to remove all weight on the parts by disassembling everything else and removing springs before checking for excess play.
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Old 10-22-2019, 03:43 PM   #45
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Probably a tire issue if its only when cold. My track tires thump pretty bad when it gets below 40 at night. It takes about 5 minutes of driving before its smooth again
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Old 10-22-2019, 04:05 PM   #46
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Quote:
Originally Posted by Spec View Post
Well, the shaking problem is still there... as I thought. Just needed to get colder again (55 degrees this morning). Although less pronounced, the shaking is still there.


Now I've got to decide where to take it... I'm really starting to suspect a bad wheel bearing. More to come.... unfortunately.....
If I remember correctly, you are over 150k miles like me, right? So it wouldn't be that unusual at this point in its life.

Question for me is, if you isolate it to a specific wheel, will you just change all 4 as more of a proactive maintenance? Upgrade hubs? I am likely getting a bit too far ahead here.
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Old 10-22-2019, 05:29 PM   #47
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Probably a tire issue if its only when cold. My track tires thump pretty bad when it gets below 40 at night. It takes about 5 minutes of driving before its smooth again



Gets worse and worse and to the point its almost undrive-able... doesn't get any better until the sun comes up. My commute here to work this morning sucked. Still had to spray off the dust because I just can't have my car that dusty/dirty...


Bushing were swapped to BMR, and the GM tech did not find any issue with them... not sure if he checked ball joints etc. Still thinking its a hub or bearing issue. I will not know more until this weekend looks like right now.



InFiD3ViL, if I find the issue on one side, I will fix the other side as well... the fronts for now as the rear continues to be solid and can't be the culprit here. If I have an issue with a rear, I will change out both rears... not sure if this answers your question.
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Old 10-22-2019, 07:11 PM   #48
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Beautiful ride home... felt new again. Not a shimmer, or shake, or anything of the sort... got up there and nothing. Fken weird!
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Old 10-22-2019, 07:15 PM   #49
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Tires...........
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Old 10-22-2019, 07:26 PM   #50
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Tires...........

Really? I don't know bro... had 3 different shops check them so far, rebalanced... they checked the wheels too. GM shop said the wheels were a bit 'oval', but they could not pin this issue on them... very frustrating.


Remember, they swapped tires/wheels with a stock set and the issue was still there... or so the GM shop told me.
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Old 10-22-2019, 07:34 PM   #51
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I’ve never seen a bad hub or suspension part fix it’s self when it warms up outside. I’m betting tires too. Just because the shops you took it to couldn’t find any issues with the tires doesn’t necessarily mean anything, I mean the gm dealer filled you car with the wrong oil after all, that wouldn’t speak much at all for my confidence in them.
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Old 10-22-2019, 07:47 PM   #52
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I’ve never seen a bad hub or suspension part fix it’s self when it warms up outside. I’m betting tires too. Just because the shops you took it to couldn’t find any issues with the tires doesn’t necessarily mean anything, I mean the gm dealer filled you car with the wrong oil after all, that wouldn’t speak much at all for my confidence in them.

You speak the truth... maybe it is the tires...

Obviously will not give up until this issue is addressed.


In regards to the oil, if something happens internally... I'm getting a new engine, at least and I'm not going to pay for it.

It is also getting swapped this weekend. Not driving it again until done.... just had to check for the issue today... only reason I drove it.
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Old 10-22-2019, 07:55 PM   #53
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Did you try collecting info while it's happening to narrow it down? Is it better or worse when...
Turning
Brakes lightly applied
Braking and accelerating at same time to maintain speed
Decelerating, constant speed, accelerating
Left lane vs right lane (road crowning difference)

The only thing I have not seen discussed is one front brake caliper not fully retracted.
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Old 10-22-2019, 07:57 PM   #54
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I can't see anything else changing that severely with temperature except tires. It's also very hard to diagnose things from someone else's interpretation on what is happening with the car. Without driving it and duplicating the concern it's all just shots in the dark
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Old 10-22-2019, 08:01 PM   #55
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Did you try collecting info while it's happening to narrow it down? Is it better or worse when...
Turning - Better when turning right on the freeway, same issue when turning left.
Brakes lightly applied - with the wheel shaking, braking makes it worse. Caliper sticking? Hmm. Possible... when cold? As the metal warms up, it tightens up?
Braking and accelerating at same time to maintain speed - probably did this once or twice and the issue was still there.
Decelerating, constant speed, accelerating - still there... but only over 40mph. Gets worse as I increase in speed. Shakes the entire car at 60+... doesn't smooth out, but becomes somewhat tolerable over 75+
Left lane vs right lane (road crowning difference) - doesn't matter what lane I'm on.

The only thing I have not seen discussed is one front brake caliper not fully retracted.

Another possibility...
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Old 10-22-2019, 08:48 PM   #56
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In cooler temps, some tires will tend to flat spot over night. After about 10 to 15 minutes of driving, the tire warms up. Not sure how you define your wobble and if it goes away. To my knowledge, 80W20 doesn't exist. So 8 quarts of 0W20. Check dipstick for correct level and if it was 80W20, you would know it. How will the car pass inspection with the airbag light?

Good question. One bridge at a time. Might take it to Allen again for the quick service. Seen and read about this air bag issue being fixed in under an hr. Gonna look that up and help point them in the right direction...... maybe..... if necessary... After all this, I'm back where I started from except now I trust dealer shops even less...
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