rhythmic vibration-
Thread Starter
Pro
Joined: Oct 2006
Posts: 654
Likes: 1
From: Prescott Valley Arizona
Frankly I'm beginning to think it has much more to do with the tire it self, more specifically the tread pattern.
I went from runflats on mag wheels (stock coupe sizes) to F1GSD-3's on repro Y2K Z06 sizes.
Frankly the weight factor was a wash due to the size increase and dumping the runflats.
My wheels have been checked and re-checked and road force balanced 5 times at the same Goodyear dealer by 3 different techs.
All with varying results, so it does matter who is running the balancer!
The car has only 53,000 on it and I have had it since it was brand new in 98 and had Never bumped a curb or damaged a tire or wheel in potholes.
Just wondering if there is a Goodyear Rep. we could contact to ride in 1 of our cars.
I went from runflats on mag wheels (stock coupe sizes) to F1GSD-3's on repro Y2K Z06 sizes.
Frankly the weight factor was a wash due to the size increase and dumping the runflats.
My wheels have been checked and re-checked and road force balanced 5 times at the same Goodyear dealer by 3 different techs.
All with varying results, so it does matter who is running the balancer!
The car has only 53,000 on it and I have had it since it was brand new in 98 and had Never bumped a curb or damaged a tire or wheel in potholes.
Just wondering if there is a Goodyear Rep. we could contact to ride in 1 of our cars.
Pro
Joined: Oct 2002
Posts: 586
Likes: 0
From: Idabel OK
124k miles on my car, but I have heard of bad wheel bearing/hubs in low mileage cars.
There was no noise or squeaks to lead me to the problem, just the rhythmic vibration that started about 50ish MPH and got worse as speed increased.
Something of note with my particular situation: My vibration started after a trip across a big curb due to showing out, sliding sideways, loosing it and sending the car over the curb. The initial blunt force hit the LF wheel first. This event obviously finished off the bearing/hub assembly that was likely worn to begin with. Only after this mishap did the vibration start. Following that night, I went to get an alignment and checked the wheel balance. The vibration continued to get worse, the car seemed to follow ruts worse and the front tires begin to wear unevenly. I started 'searching' on the Corvetteforum for answers and the wheel bearing was the most likely culprit. Changed the front assemblies (vibration seemed to be isulated to the front) and the car drives normally now.
Hope this helps and good luck
Eric <><
Thread Starter
Pro
Joined: Oct 2006
Posts: 654
Likes: 1
From: Prescott Valley Arizona
Dealer found nothing wrong with the bearings but did suspect the wheels. One of the wheels has considerable "scaring" on the inside bell apparently from tire changers. It is suspect this may have led to some wheel out of roundness concerns. The mech said that a lot of aftermarket wheels are not perfectly centered on the hub which also may lead to premature failure of bearings.
While the road forced balance is essential in garnering a true as possible balance, it is essential the wheel be true as the suspension systems on the Corvette are fine tuned and extremely sensitive.
Since one wheel I have is questionable, the tire dealer where the wheels were purchased has re-ordered another.
I may be considering going back to OEM/stock wheels-
While the road forced balance is essential in garnering a true as possible balance, it is essential the wheel be true as the suspension systems on the Corvette are fine tuned and extremely sensitive.
Since one wheel I have is questionable, the tire dealer where the wheels were purchased has re-ordered another.
I may be considering going back to OEM/stock wheels-
Thread Starter
Pro
Joined: Oct 2006
Posts: 654
Likes: 1
From: Prescott Valley Arizona
Dealer found nothing wrong with the bearings but did suspect the wheels. One of the wheels has considerable "scaring" on the inside bell apparently from tire changers. It is suspect this may have led to some wheel out of roundness concerns. The mech said that a lot of aftermarket wheels are not perfectly centered on the hub which also may lead to premature failure of bearings.
While the road forced balance is essential in garnering a true as possible balance, it is essential the wheel be true as the suspension systems on the Corvette are fine tuned and extremely sensitive.
Since one wheel I have is questionable, the tire dealer where the wheels were purchased has re-ordered another.
I may be considering going back to OEM/stock wheels-
While the road forced balance is essential in garnering a true as possible balance, it is essential the wheel be true as the suspension systems on the Corvette are fine tuned and extremely sensitive.
Since one wheel I have is questionable, the tire dealer where the wheels were purchased has re-ordered another.
I may be considering going back to OEM/stock wheels-
Ordered and placed Hub Centric Rings on all four wheels. A lot of the vibration problem has went away. Not to say its all gone but the Hub Centric Rings did do some good on insuring the wheel were centered on the hub. If you have similar problems and aftermarket wheels, I would give it a shot. Shipping and parts were around $30.00 and get the plastic as the aluminum have a tendency to corrode-fwiw.
www.1010tires.com/hub rings in case anyone wants to check out the site. The 98 hub size is 72.62mm
Last edited by Burgie; Mar 3, 2007 at 09:57 AM. Reason: address
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
Update:
Ordered and placed Hub Centric Rings on all four wheels. A lot of the vibration problem has went away. Not to say its all gone but the Hub Centric Rings did do some good on insuring the wheel were centered on the hub. If you have similar problems and aftermarket wheels, I would give it a shot. Shipping and parts were around $30.00 and get the plastic as the aluminum have a tendency to corrode-fwiw.
www.1010tires.com/hub rings in case anyone wants to check out the site. The 98 hub size is 72.62mm
Ordered and placed Hub Centric Rings on all four wheels. A lot of the vibration problem has went away. Not to say its all gone but the Hub Centric Rings did do some good on insuring the wheel were centered on the hub. If you have similar problems and aftermarket wheels, I would give it a shot. Shipping and parts were around $30.00 and get the plastic as the aluminum have a tendency to corrode-fwiw.
www.1010tires.com/hub rings in case anyone wants to check out the site. The 98 hub size is 72.62mm
For 2 reasons one is the frozen wheel thing, wheel actually gets corroded to the hub. And the other thing is the factory wheels are lug centric.
Now that being said, my vibration has almost completely disappeared with nothing being done except driving it normally.
I'm guessing it's just the squrim of the tread and new rubber needs to get broken in.
Racer
Joined: Mar 2003
Posts: 277
Likes: 4
From: Halfmoon New York
questions on the hub issue
tell me about these hub do hickys. How do they help? I understand the fit ont he rotors but hiow do they insure a more centered fit? Also, what was meant by the lugs being centric [aside, these are non-fac wheels]
Bearings. I do recall, sometimes, when I turned hard in a parking lot I would get a noise from the front. A sort of "wurp-wurp" I figured it was bearings but didn't worry figuring I'd wait till it got worse. Maybe will replace these sooner than not. what do ya think that would run if the dealer did them (assuming I can't do them)
Bearings. I do recall, sometimes, when I turned hard in a parking lot I would get a noise from the front. A sort of "wurp-wurp" I figured it was bearings but didn't worry figuring I'd wait till it got worse. Maybe will replace these sooner than not. what do ya think that would run if the dealer did them (assuming I can't do them)
Last edited by Sbrennan; Mar 10, 2007 at 11:36 PM.
Racer
Joined: Mar 2003
Posts: 277
Likes: 4
From: Halfmoon New York
regarding bearings
So, now that I read this more I recall popping off the side of a shoulder that had a dip in it (raised blacktop edge dropped to a dirt shoulder). I also have to say, and maybe this is my imagination, but during the first cold days here in the NE I was still driving it and I'm pretty sure I did _not_ get the vibration when at the same speed, at least not until after 10 miles or so and the engine (and other rotating parts ??) were warm.
During a normal warm day I could feel it almost right away. I also noticed the exhaust (Borla with x pipe) was quieter on those cold days so I thought I'd check that in the spring, just to make sure there wasn't a loose pipe that was setting up a resonance. I'm not sure if they have to remove the exhaust when they installed my differential (which is when this all started)
During a normal warm day I could feel it almost right away. I also noticed the exhaust (Borla with x pipe) was quieter on those cold days so I thought I'd check that in the spring, just to make sure there wasn't a loose pipe that was setting up a resonance. I'm not sure if they have to remove the exhaust when they installed my differential (which is when this all started)
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Thread Starter
Pro
Joined: Oct 2006
Posts: 654
Likes: 1
From: Prescott Valley Arizona
Sounds like yours is more bearings-but then who knows. I've put on the hub centric rings, no change. They are the plastic ones to prevent the corrosion fator. I think I'll go back to stocks and if it is still there, I would have to say "FSD3" and maybe some cars just can not run the tread design.
Cruising
Joined: Jun 2006
Posts: 11
Likes: 3
From: san diego ca.
vibration
Hey Burgie, I was just reading through the forum for info about the rythmic vibration, as my 01 does it also, it has factory magnesiums and michelin pilot sport A.S. runflats, It kinda drives me crazy, I am here in Havasu as well, I do have a set of 2k style wheels tucked away? keep me posted on your progress.
Thread Starter
Pro
Joined: Oct 2006
Posts: 654
Likes: 1
From: Prescott Valley Arizona
Hey Burgie, I was just reading through the forum for info about the rythmic vibration, as my 01 does it also, it has factory magnesiums and michelin pilot sport A.S. runflats, It kinda drives me crazy, I am here in Havasu as well, I do have a set of 2k style wheels tucked away? keep me posted on your progress.
thanks
steve
