DebRedZR1

REAL Interesting the TSB/GM considers this "normal" , but not all cars have the issue and even the Dealership said :
Translation: GM doesn't have a clue what to do so that is their way of getting around it.

Dicecal

Just went through the same issue with my Cadillac CTS. Just hate the service run around. The road force balance fixed it on my Caddy, but in the Caddy TSB they will replace the lower control arms if they can't fix it with the road force balance. My Z06 has never had any issues, and the wheel steering wheel is rock steady at all speeds. Good timing as I have been thinking about getting a ZR1, would hate to have to deal with this again....just something for me to consider I suppose.

Leroy Amy

Guys, you also need to make sure that your balance if done on a 9700 Hunter balancer and has the "SMART WEIGHT SOFTWARE", this cuts down on the weight needed to balance and also gives you a much better balance along with ROAD FORCE. This is the latest softwre update for the Hunter balancers and does a GREAT JOB. I don't sell HUNTER BALANCERS but work with them every day, they definately correct tire balance.
Hope this helps .

Fish-man

if anyone wants to experiment...try to find some thin 'shim' and stick it to the wheel pilot so that it would take up any slack between wheel and hub.... make sure it doesn't keep the mounting face of the wheel from completely contacting the rotor surface.

skeetdaddy

My first 2010 had a terrible vibration above 70.....We tried everything according to the TSB that is out on this....The only thing that helped a little we retorqued a few lug nuts that were severely over torqued...I finally took advantage of the GM buyback problem offered at that time.....My second 2010 is smooth as silk but came with a bad clutch....My 09 vibrated between 70-80 even after several balances.....

DebRedZR1

WELLLLLL I was just informed that the car now is even worse than before they did all the work on it and now vibrates between 65-80. And is really bad when 1st going out on the highway.
Something is wrong and GM need to figure it out YESTERDAY

Dicecal

Not good news, keep us updated

JDRacing

Deb, first, really sorry (and disappointed) to hear this.

Without trying to make a lot of work for you, can you list the order of what they did, and what they either told you (or you experienced) at each stage? I went back and read all of your earlier posts in this thread, and it seems like they replaced all four wheels and tires at some point (maybe not the first thing they tried?), and it made it a lot better, but not perfect, and then they tried some other things, like road force balance, and perhaps something else, which made it worse.

Trying to get a handle on what they did which helped, and what they did to make it worse. This absolutely sucks with a brand new car which is otherwise great beyond words.

Obviously the TSB isn't getting the job done. Sounds like whatever is going on is somewhat tire temperature and/or air pressure sensitive.

Corvette_Outlaw

Deb asked me to reply as I am the primary driver....sadly, all we know is what we were told by the service girl who does not even know that there is a cig lighter/power outlet behind the flip down door. They were told that it has no power and they argued that there is no cig lighter, but that the console power outlet is working fine.

As far as the vibration goes....they first said that they were able to balance the left front to within spec, but that the right front would need to have the wheel and tire replaced. They said that both the tire and wheel would be there the next day and the decision was made to leave the car (possible sad story for another time).

The next day they called Deb and said they had installed the new tire and wheel and then they test drove the car and decided to have both front wheels Road Force balanced at a nearby tire store. The service manager then told Deb that the car was better by not perfect. Because of suspicious treatment of the car, the decision was made to return the car to the safety of Deb's garage.

Sadly, upon my driving the car on the freeway, I was shocked to see that this brand new ZR1 had a much worse vibration than before (now vibrating between 65 and 82mph), and actually felt UNSAFE to drive at higher speeds.

matt

JDRacing

Ok, thank you for the sequence and results. So, what I'm getting from this is they returned it to you with label "better but not perfect", and what you got back was much worse than when you started.

I wonder if it's time to, in the safety of Deb's garage, remove all four wheels and tires and take them to somone you know and trust for a road force balance? Tough to drop off your $120K car to a service writer/person who doesn't know much, if anything, about it.

Corvette_Outlaw

That would be correct. I don't think there is a problem with the rear tires, as the vibration is mostly the steering wheel....but that might be the way to go, except, should someone HAVE to do that on any new car, let alone one that costs as much as a ZR1 ????

DebRedZR1

Thanks for all the ideas Jeff. The more I think about it the madder I get they claim it was better and in fact it is way worse.

And try to claim it is normalThanks for posting the details Matt

Sure not what I expected and we will keep you updated

JDRacing

Just some empathy from the Left Coast: Don't blame you one bit, and smoke would be coming out of my ears right about now, too. Hang in there--it'll get sorted out.

ErnieD

My new 2010 Z06 had a mild but quite noticeable steering wheel vibration between 75 and 85 mph -- felt to me like one of the front wheels/tires out of balance. I had the balance on all four wheels/tires checked, and the problem turned out to be the left rear out of balance by 3/4 oz. None of the other three required rebalancing. I have experienced steering wheel shake from rear wheel imbalance before, so we didn't stop after just checking the fronts. Make sure you check balance on the rears as well as the fronts.

I hope that's your problem.

Ernie

augydog

I too had a vibration problem with new NT-05's on my Z06.
Turned out to be the rear wheels slighly out of balance.
I could barely feel it in the steering wheel.
Hope thats it.

Good luck.

augydog

Z06 Sport

Any update, hope you got it corrected?

Luweegy

My 2010 is perfect, no shake at all. I'm sure that will change with the aftermarket wheels I'm getting.Looking forward to putting the ZR1wheels and tires on my Z06. Guess I got lucky.You might try going to a Michlin dealer,sounds like you may have flat spoted tires some where on the car.Good luck with you problem.Update after 500 miles the car had a shake 75 mph. I bought new wheels and michlins and it went away.

DebRedZR1

Waiting to hear back from the dealership
They put an OLD tire on that does not match and scratched both rims. Told them they needed to replace both tires and rims and will go from there some place else.

ratmotortom

wow.

DebRedZR1

Wow is being polite Tom LOL.

Latest update: After talking to Geoff here on the Forum and many calls to the dealership letting them know what things are not adding up two new rims/tires from the factory are on their way. I requested that they be overnighted and factory balanced/mounted but they claim this order was already in place and the factory would not send them mounted/balanced

They want to have a local tire place here balance them and the dealership will mount them. Not sure on this.

Hopefully it will at least bring the car back to where it was and if the vibration is there we will pursue a different options.

Now they are saying they KNEW when they sent it back it was worse and never took it on the highway it was so bad. SO they gave it back to us telling us it was better but not perfect why???????

Will post further updates