hionbusa

Hello,

-I have an 07 z06 . Every time i go over uneven surface such as entry to a shopping mall or gas station at very low speed , i hear stress crackling noise coming from the rear panel area and sometimes the front pane also. I Noticed that one of the rear wheels would lift off the ground sometimes ...

-No noise when I'm cornering hard either side,going over speed bumps or pot holes .

-I believe I heard the same noise from another 2007 z06 I test drove before buying mine .

The noise is better described as body roll from suspensions being too stiff ..... I used to hear the same noise after lowering my fox body mustang with no sway bars.

Dealership is talking about a" possible" Cracked Welds in the frame!!!
According to the service manager, there is a GM bulletin for this issue ... They are investigating it and getting back to me tomorrow.


anybody had this issue or is this normal behavior for the Z06?


Thanks,

gogetterZ06

hey guy have your roof checked out...i have a 2007 z06 and it was making the same noise...everyone says that it was only the 2006 model z06 with the roof recall...good thing i brought it back to the gm dealer. my roof was fixing to blow off. they replaced the complete roof...i can't beleive on a 70k car that the roof was just glued on

hionbusa

I did . They reglued the roof with a "special gm glue" and replaced retaining rings. Still makes the noise.

Right, $70k car shouldn't sounds like a lowered fox body mustang going over any surface.

AFVETTE

My 07 makes some "creaks and groans" that my 06 Z51 coupe never made. I had the roof checked and its fine. I think it's the aluminum frame and less insulation causing these noises.

I hope anyway.

Tom

hionbusa

wow! same way ? EX: "entering an uneven surface (up or down) and having to put the car kinda side ways not to scrape" ??

P0LISH SAUSAGE

Hmmmm, I have a very steep driveway and i must come into my garage at an extreme angle to limit the amount of air dam and front splitter scraping. Occasionaly one of the rear wheels comes off the ground and I can feel the frame flex and hear some creaking.

It's the kind of creaking you occasionaly hear jacking up the Z06 or any other car for that matter.

I've not had any concerns, but now your post has me thinking!

hionbusa

Yep ! right on. Driving very slow makes it even worst.

Turbooo2u

Believe it or not, it seems that the weatherstripping around the rear hatch area can squeak over low speed bumps.

mercruiser

One thing that I have noticed about my '07 is no creaks ever. My C3's and C4's creaked and groaned terribly. I guess it's what you get with t-tops and targas. I know the C6 is a lot stiffer than the C5 and a fixed roof should should make the car flex less. I would definately have my roof checked or have the roof braces checked. I believe that they are bolted in place.

hionbusa

the car is fine under normal and performance driving .up to 0.90G :-)... no chassis flex or chatter etc..Only when going over uneven surface. Roof check was performed

P0LISH SAUSAGE

Well that's just it, with one of the wheels off the ground I would expect a hell of a lot more creaking and groaning.

Although the post has me thinking, I'm not too worried.

My 08 Z has less than 5000 miles on it. I've hit some nasty bumps, traversed some very rough Chicago roads, and had too many WOT launches to count, all without any creaks, rattles, or groans. The ONLY time I hear slight creaking is when the frame gets flexed when one of the rear wheels comes off the ground going up my driveway.

bcmarly

As others have said your creaking noises are in all likelihood coming from your weather stripping. The rubber that GM uses is very stiff. Having said that, there is a solution: Lubricate the weather stripping around the windows, the top part in particular. Crawl inside the trunk area and lubricate the weather stripping that runs parallel to the roof. I have yet to find a lubricant that works for any lengthy period of time. I use white lithium grease and it works, but it seems to lose its effectiveness after a few months. I also live in a very dry climate, which contributes to the problem.

0Randy@DRM

For a rear tire to pull off the ground, the uneven must be pretty uneven.

Randy

teking

Yep thats where mine comes from. BTW to the OP .... first time in they try to glue it. Second time they replace it. 06VY been there done that. Only true fix is to replace.

Just like the rear diff clutch pack issue. First time they change the fluid and put in a additive. Second time the change out the cluth packs. Again ... been there done that.

hionbusa

interesting!

Pistol Champ

A great lubricant for your seals is Di-Electric grease. It is designed for this purpose. A little goes a long way and it lasts a long time.

NHRA95

Might sound crazy, but check the rear axle nuts, and report back.

C6DuffMan

So I'm dealing with this same noise in my 09 Z. I hate to think this is the frame. This is what has been done so far. So far I've had no success in finding it.

- New sway bar end links. Newest GM design.
- Disconnected one end of sway bar.
- Lubed hatch latch, and hinges.
- Tested with hatch up. Hatch closed, but not latched. Had a big towel between the latch and catch so it was nice and padded. None of the weatherstripping was in contact with the hatch.
- Lubed every bushing with WD40. (Getting desperate).

Currently, my theory is it's the ride height adjusters scraping on the lower control arm. When I was lubing everything, I sprayed some WD40 under the adjusters and I think it helped. But the next day is was back.

In looking at the lower control arm, you can see marks where the adjuster slides back and forth as the a-arm moves up and down. I was surprised how much they seem to move. Also, the surface on the control arm is pretty rough. I'm not sure what material is on the end of the adjuster, is it steel or some type of plastic?

This weekend, I'm planning on getting some good grease in there. I'm hoping I'm on the right track as I'm running out of ideas. I suppose it could be an a-arm bushing or ball joint. I think the next steps would be to remove the rear leaf and see how the suspension moves and sounds without load.

For the record, I took it to the dealer and they said they didn't hear it.

C6DuffMan

Just to add, the axle nuts are tight and it's not the diff clutch pack. I can do figure eights all day on a flat surface and it's silent.

racingvett

In doing a search here is one GM TSB related to cracked frame welds I found

http://teamzr1.com/ubbthreads/ubbthr...=2121#Post2121