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Search: Posts Made By: marktigerz
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Forum: C7 Tech/Performance
10-11-2014, 04:18 PM
Replies: 7
Views: 1,104
Posted By marktigerz

mine had a similar issue although your appears to...

mine had a similar issue although your appears to be more pronounced. My dealer had a field engineer come and check it out. He ended up adjusting something in the shifter assembly...made a huge...
Forum: C7 Tech/Performance
10-11-2014, 08:21 AM
Replies: 48
Views: 6,801
Posted By marktigerz

rear wheel alignment was found to be off....

rear wheel alignment was found to be off. Adjusted and the car is driving much better now although a subtle vibration remains but now it is only between 90-95 mph and then goes away
Forum: C7 General Discussion
10-11-2014, 08:20 AM
Replies: 35
Views: 8,048
Posted By marktigerz

rear wheel alignment was found to be off....

rear wheel alignment was found to be off. Adjusted and the car is driving much better now although a subtle vibration remains but now it is only between 90-95 mph and then goes away
Forum: C7 General Discussion
10-06-2014, 06:51 PM
Replies: 35
Views: 8,048
Posted By marktigerz

car is going to milford proving grounds ...

car is going to milford proving grounds

Progress at last!
Forum: C7 Tech/Performance
10-06-2014, 06:49 PM
Replies: 48
Views: 6,801
Posted By marktigerz

I am told car is going to milford proving grounds...

I am told car is going to milford proving grounds tomorrow

Progress at last!
Forum: C7 General Discussion
10-03-2014, 01:19 AM
Replies: 35
Views: 8,048
Posted By marktigerz

I posted this update in the performance section a...

I posted this update in the performance section a few days back. I just wanted to update this thread too:

9/29: New rotors apparently made the vibration worse when re-tested on the dyno

9/30:...
Forum: C7 Tech/Performance
09-30-2014, 11:26 PM
Replies: 48
Views: 6,801
Posted By marktigerz

Yes I tried that and the vibration persisted but...

Yes I tried that and the vibration persisted but not with the same intensity and it will quickly fade as the speed drops.

Further updates. The car right now is sitting at a performance auto shop...
Forum: C7 Tech/Performance
09-29-2014, 02:26 AM
Replies: 48
Views: 6,801
Posted By marktigerz

New rotors apparently made the vibration worse...

New rotors apparently made the vibration worse when re-tested on the dyno

Waiting to see what the next step is this week
Forum: C7 General Discussion
09-28-2014, 08:34 AM
Replies: 98
Views: 22,429
Posted By marktigerz

mine was exactlty the same and was FIXED by my...

mine was exactlty the same and was FIXED by my dealer a few months ago. The shifter mechanism needed to be adjusted. They had a GM engineer come in and adjust it and it now shifts much smoother in...
Forum: C7 Tech/Performance
09-26-2014, 04:30 PM
Replies: 48
Views: 6,801
Posted By marktigerz

updates: The thought now is that it is a...

updates:

The thought now is that it is a "first order vibration" (not sure what that means).

The dealer is going to swap the rotors as the next step and test it to see if additional deeper...
Forum: C7 General Discussion
09-26-2014, 04:28 PM
Replies: 35
Views: 8,048
Posted By marktigerz

I do have MRC and when I put it in track mode,...

I do have MRC and when I put it in track mode, the vibration is not felt much but it is mainly because the car is so bouncy that it dampens any other abnormalities, or that is what I thought at...
Forum: C7 General Discussion
09-26-2014, 02:16 PM
Replies: 35
Views: 8,048
Posted By marktigerz

The dealer did bring an analyzer. We used it both...

The dealer did bring an analyzer. We used it both on a road test and with the car on a dyno. He hooked the probe of the analyzer under the driver seat. It registered 20-22 hz frequency vibration at...
Forum: C7 Tech/Performance
09-26-2014, 02:09 PM
Replies: 48
Views: 6,801
Posted By marktigerz

Thanks to all for the hints. The service...

Thanks to all for the hints.
The service manager placed the probe under the seat based on what GM service department aked him to do (because that is where I feel the vibration..ie when I am in the...
Forum: C7 Tech/Performance
09-25-2014, 08:37 PM
Replies: 48
Views: 6,801
Posted By marktigerz

The dealer did bring an analyzer. We used it both...

The dealer did bring an analyzer. We used it both on a road test and with the car on a dyno. He hooked the probe of the analyzer under the driver seat. It registered 20-22 hz frequency vibration at...
Forum: C7 General Discussion
09-25-2014, 08:28 PM
Replies: 35
Views: 8,048
Posted By marktigerz

It did help and it did confirm that there is...

It did help and it did confirm that there is indeed an abnormal vibration to the car.
My problem is that we are at a stand still with what is wrong with the car. Although my dealer is trying his...
Forum: C7 General Discussion
09-24-2014, 02:14 PM
Replies: 35
Views: 8,048
Posted By marktigerz

It definitely was not there when new. Also, I...

It definitely was not there when new. Also, I test drove the 2015 z51 with the service manager before we transferred its wheels to my car and it drove rock solid at 100 mph!
Forum: C7 Tech/Performance
09-24-2014, 09:35 AM
Replies: 48
Views: 6,801
Posted By marktigerz

Vibration at high speed

First time posting in this section

I need thoughts and suggestions

My 2014 z51 M7 with 10,000 miles recently developed a noticeable high frequency vibration that I feel in the entire car (not...
Forum: C7 General Discussion
09-23-2014, 09:39 PM
Replies: 35
Views: 8,048
Posted By marktigerz

Vibration at high speed

I need thoughts and suggestions

My 2014 z51 M7 with 10,000 miles recently developed a noticeable high frequency vibration that I feel in the entire car (not the steering wheel) at speeds above 90...
Forum: C7 General Discussion
09-09-2014, 11:42 PM
Replies: 37
Views: 3,412
Posted By marktigerz

Apparently it is a normal thing. service...

Apparently it is a normal thing.
service manager went on a test drive with me today, I was able to replicate the issue for him. He said tit is a normal thing ! I guess I will just have to never...
Forum: C7 General Discussion
09-08-2014, 10:19 PM
Replies: 37
Views: 3,412
Posted By marktigerz

I am actually taking my car in to the dealer...

I am actually taking my car in to the dealer tomorrow. I spoke to the service manager and him and I are going for a test drive where I will demonstrate the problem to him.
My car also has developed...
Forum: C7 General Discussion
08-31-2014, 09:07 PM
Replies: 37
Views: 3,412
Posted By marktigerz

interesting and thanks. How do I best describe...

interesting and thanks. How do I best describe this to the dealer so he knows to check on the sway bar? He may think I am crazy if I just tell him the car feels like its bending or twisting :toetap:
Forum: C7 General Discussion
08-31-2014, 08:28 PM
Replies: 37
Views: 3,412
Posted By marktigerz

So I have the exact same problem. Not just...

So I have the exact same problem. Not just annoying and makes you feel you are inside a plastic car but it is also scary to think that the car frame is not that rigid! I am also talking about...
Forum: C7 General Discussion
07-29-2014, 07:51 AM
Replies: 9
Views: 1,326
Posted By marktigerz

I started noticing it soon after I got mine and...

I started noticing it soon after I got mine and wrote about it here. My dealer (who can not replicate it because they are not driving it over bumps at night) thinks it is normal
...
Forum: C7 General Discussion
05-24-2014, 03:35 PM
Replies: 34
Views: 4,237
Posted By marktigerz

I found this interesting explanation on a mustang...

I found this interesting explanation on a mustang forum where somone posted a reply to a similar complaint:
Forum: C7 General Discussion
05-24-2014, 03:29 PM
Replies: 34
Views: 4,237
Posted By marktigerz

No, it is exactly that, only during bumps not...

No, it is exactly that, only during bumps not after. Is that normal though?
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