[Z06] Wobbly Z06
Thread Starter
Pro
Joined: Nov 2006
Posts: 564
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From: Bay Area CA 665whp & 595wtq
Wobbly Z06
At a lil of 100+ my 03 Z06 feels loose. Like I'm almost afraid to switch a lane at that speed. The shocks seem to give a lot of play and every little bump sends the car bouncing up and down. It feels as if the car is just going to come out on me and send me into a slide or a spin. On the street at slower speeds is fine though and the car feels very tight. Is this normal? What can I do to fix this problem?
Racer
Joined: Nov 2002
Posts: 397
Likes: 0
From: Auburn AL
the first thing I would check is tire pressure. If you have 30-35 lbs all the way around that shouldn't be the problem. If it's not the tires the next thing I would do is get your alignment checked.
Have you lowered your car from the stock settings. If so, have you had your car aligned since you lowered it? That is a common problem.
Good Luck
Have you lowered your car from the stock settings. If so, have you had your car aligned since you lowered it? That is a common problem.
Good Luck
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
At a lil of 100+ my 03 Z06 feels loose. Like I'm almost afraid to switch a lane at that speed. The shocks seem to give a lot of play and every little bump sends the car bouncing up and down. It feels as if the car is just going to come out on me and send me into a slide or a spin. On the street at slower speeds is fine though and the car feels very tight. Is this normal? What can I do to fix this problem?
First issue MAY be shocks, the 2004 Z06 comes with a better shock, and it is a direct fit on any Z06 ... see ....
PKZ06SHOCKKIT
(part number) www.gmpartsdirect.com
The second issue is Cali freeways ... they are so bad that every time I hit a bump that jars my teeth ... I say "F**k CalTrans" .... and that happens a lot .... the fact is that there are roads in Iraq that are in better condition than the California freeway system.
Le Mans Master
Joined: Aug 2005
Posts: 7,201
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From: DP(oh you know where) IL
St. Jude Donor '06
could be an alignment issue. I have had mine up to 160 and it feels just as stable as it would at any speed. Have your alignment checked and make sure they give you a before and after readout!
Also reading some of the other posts here, it can be bump steer. the 2004 z06 shocks will cure that. I also hear that some type of endlink will fix that as well. Sorry I cant remember the brand
Also reading some of the other posts here, it can be bump steer. the 2004 z06 shocks will cure that. I also hear that some type of endlink will fix that as well. Sorry I cant remember the brand
Racer
Joined: Jan 2007
Posts: 283
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From: St. Louis MO
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Drifting
Joined: May 2004
Posts: 1,822
Likes: 2
From: San Clemente CA
Do you have it lowered beyond the factory bolt adjustments, e.g. cut bushings and a lowering kit? If so, you could be bottoming the stock shocks, causing loss of damping and uncontrolled suspension movement. If not, it's probably alignment or something is just worn out.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
First issue MAY be shocks, the 2004 Z06 comes with a better shock, and it is a direct fit on any Z06 ... see ....
PKZ06SHOCKKIT
(part number) www.gmpartsdirect.com
PKZ06SHOCKKIT
(part number) www.gmpartsdirect.com
Le Mans Master
Joined: Dec 2006
Posts: 7,251
Likes: 16
From: Phoenix Arizona
At a lil of 100+ my 03 Z06 feels loose. Like I'm almost afraid to switch a lane at that speed. The shocks seem to give a lot of play and every little bump sends the car bouncing up and down. It feels as if the car is just going to come out on me and send me into a slide or a spin. On the street at slower speeds is fine though and the car feels very tight. Is this normal? What can I do to fix this problem?
otherwise definitely suspension. have a pro look at it. you don't want to get killed !
Le Mans Master
Joined: Dec 2006
Posts: 7,251
Likes: 16
From: Phoenix Arizona
tires?
At a lil of 100+ my 03 Z06 feels loose. Like I'm almost afraid to switch a lane at that speed. The shocks seem to give a lot of play and every little bump sends the car bouncing up and down. It feels as if the car is just going to come out on me and send me into a slide or a spin. On the street at slower speeds is fine though and the car feels very tight. Is this normal? What can I do to fix this problem?
otherwise definitely suspension. have a pro look at it. you don't want to get killed !
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
Mine does too.
'03 with 15k miles.
Second owner. Accelerating up to 120MPH - it feels loose in the back and a little wobbel (sp?)....
It always felt that way since i got it 6k miles ago.
I'll prob do a allignment first.
'03 with 15k miles.
Second owner. Accelerating up to 120MPH - it feels loose in the back and a little wobbel (sp?)....
It always felt that way since i got it 6k miles ago.
I'll prob do a allignment first.
Racer
Joined: Jan 2007
Posts: 283
Likes: 0
From: St. Louis MO
7th Gear
Joined: Jun 2006
Posts: 7
Likes: 0
From: York PA
There has to be something loose, worn, or broken. My 2002 Z06 has 30k hard miles on it and I could it a bag lunch in it at 120mph while changing lanes and not blink an eye. It is quite stable at 150mph and there is no way the California roads are that much worse than Pennsylvania. We are known on this coast as having poor roads.
(Suspension is all stock, although looking at some Bilsteins)
(Suspension is all stock, although looking at some Bilsteins)
Le Mans Master
Joined: Dec 2006
Posts: 7,251
Likes: 16
From: Phoenix Arizona
There has to be something loose, worn, or broken. My 2002 Z06 has 30k hard miles on it and I could it a bag lunch in it at 120mph while changing lanes and not blink an eye. It is quite stable at 150mph and there is no way the California roads are that much worse than Pennsylvania. We are known on this coast as having poor roads.
(Suspension is all stock, although looking at some Bilsteins)
(Suspension is all stock, although looking at some Bilsteins)
the weight seems to be loadin' up and easily spilled to one side when you change lanes? mAybe?
please let us know what you find!
Le Mans Master
Joined: Dec 2006
Posts: 7,251
Likes: 16
From: Phoenix Arizona
Instructor
Joined: Feb 2007
Posts: 240
Likes: 0
From: Lewistown MT
Mine does this a bit too, I have a 17K mile 02 z06, and can be downright scary. The term for this effect is called Tramlining and is particularly noticeable on road seams. I recently contacted a company that specializes in performance suspension systems; they set up a lot of road race cars. They told me it is most likely an alighnment issue. Needles to say, I will be bringing my car into them soon.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,822
From: Charlotte, NC (formerly Endicott, NY)
My 03Z has ~36K miles on it and it runs down the road just fine at triple digit speeds. I just spent 10 days in the LA area and the worst freeway (the person I was visiting was complaining) I rode on seemed smooth as glass compared to the roads in my area. At 145 on the track my car feels planted to the asphalt. Either your car needs an alignment (a little toe in reduces wander), has been lowered to far, has been lowered and not aligned or there is a broken part.
Bill
Bill