Vibration at 70mph in my Brand new 2007 C6 Vert

[robertpel9]

My brand new 2007 vert vibrates at 70mph. I am still breaking it in so i am not supposed to go over 55 but try that on an atlanta highway. Anyway today was the first day ont he highway and i took it out just now as well here is the deal it is smooth as a babys bottom all the way to 70. Right at 70 i get a decent vibration through the steering wheel like the front wheels are out of balance. I have not pushed it up into the 80's to see if it goes away but...... If i turn the wheel left or right at 70 it goes away. I was thinking is i turned it one way and it went away and the other way same or worse then its a wheel bearing but it goes away as long as the wheel is not dead center. Its not the engine or anything like that i had it stopped in my draiveway and with the clutch both in and out there is no vibration at all as i move through the powerband Is this just a simple wheel out of balance or is there more to it. I called the dealership today and they could not tell me much, one told me i had to give it a few hundred miles for the car to "synchronize" LOL what absurdity Anyway you guys know your stuff, what do you think. I dont even want to take it to the dealer. Balance / Alignment / more???????

[robertpel9]

Update

Ok i guess i was wrong. It does still vibrate about the same when turning left to right at those speeds. I also took it up faster on my way into grad school this morning (i won't say how fast but fast and it doesnt go away but seems to minimize as it gets fast (it was really to hard to tell to be honest i just know it starts at 70 and turning doesnt fix it after looking at it closely

I am now leaning towards a simple out of balance wheel. I cant tell about the vibration but on the smoothest parts of the highway but it is very discernamble at 70 mph at highway speeds, you can see the wheel shake it you let go of it. Car tracks in a deal straight line, seems to be perfectly alinged.

Your thoughts? Simple wheel balance issue?? I hope so. I was worried it might be wheel bearings but the car is silky smooth exect for the 70+ area and there is no noise.

Let me know what you think

[UstaB-GS549]

What ever the problem, It won't heal itself. More than likely it is missing a balance weight. Give it the shake test and see if you can detect something like a loose wheel or something. Good luck.

Look to see if you have a wheel that does not have a weight on it. It is pretty unusual for a wheel to have zero balance weights.

[robertpel9]

To make a long story short thedealer said they neded my car for a day or two and would send it to their tire place. What a joke. I took it to discount tire where i know the people well and the road force balanced the tires on the Hunter 9700 machine. Sure enough one of the front wheels was way messed up from the factory. The wheel was fine but it told him that the tire could not be balanced. They took 45 minutes to rotate the tire around on the wheel and go through several cycles on the machine and it balance out perfect with minimal wheel weights

They took anothe half hour and rebalance my other front tire on the hunter road force machine and it balanced our perfect

Car now is vibration free and perfect. Why in the heck can't GM get it right out of the plant. There was a ton of weight on the offending wheel and obviously they did not care to balance it right

I am out 50 bucks because i did not care to deal with the dealership and thier BS. At first they told me the car needed time to "synchonize". Thik i can get my 50 bucks back LOL

BTW in case anyone wanted to know (most probably do but i did not) the chrome wheels are made by speedline in Italy. It's stamped inthe back.

I love Corvettes but i'll never own any other GM products. Thank God they make the corvette though. Best car under 100 large by far IMO

At least all it was was a balancing issue, i am still steamed that I had to spend 50 bucks already on a 55k dollar car with 173 miles on it

[BEZ06]

Originally Posted by robertpel9

......They took 45 minutes to rotate the tire around on the wheel and go through several cycles on the machine and it balance out perfect with minimal wheel weights

.....They took anothe half hour and rebalance my other front tire on the hunter road force machine and it balanced our perfect

.....Car now is vibration free and perfect.

.....i am still steamed that I had to spend 50 bucks.....

Yeah, that's pretty crappy you had to spend $50 for something the dealer should have taken care of, but I think it's money well spent for the time they put in and the peace of mind to know the job was done right.

Thanks for the update, and glad everything is okay for now!

Bob

[robertpel9]

Originally Posted by beezeye

Yeah, that's pretty crappy you had to spend $50 for something the dealer should have taken care of, but I think it's money well spent for the time they put in and the peace of mind to know the job was done right.

Thanks for the update, and glad everything is okay for now!

Bob

Peace of mind was the main thing. I got to stand there and watch them jack it up work with the wheels, clean them, etc

At least i know it was not a hack job, i am going to tell the dealer that they owe me an oil change for my inconvenience if they want a good new buyer survey result from me