Periodic Vibration at Speed
Thread Starter
Burning Brakes
Joined: Apr 2001
Posts: 860
Likes: 0
From: Austin TX
St. Jude Donor '14-'15
Periodic Vibration at Speed
Just picked up my new Z06 and while driving cross country I noted a low frequency vibration in the speed range of 75-90. The cycle of the frequency is about ever one and one half seconds. At first I thought it was pavement, but the vibration persists on different road surfaces.
Has anyone else noticed this? Any suggestions on how to diagnose the cause and fix the problem?
jerboa :confused:
Has anyone else noticed this? Any suggestions on how to diagnose the cause and fix the problem?
jerboa :confused:
Thread Starter
Burning Brakes
Joined: Apr 2001
Posts: 860
Likes: 0
From: Austin TX
St. Jude Donor '14-'15
Re: Periodic Vibration at Speed (FRISKY)
It is definitely a vibration, and not exhaust. As it happens I could watch the edge of the visor and watch it vibrate and stop, etc. The dest way to describe it would be to bave about fifty yards od rough pavement followed by fifty yards of smooth pavement. So there is a vibrate - smooth, vibrate -smooth pulse with a rather slow cycle rate. I'd expect a thrown wheel weight to vibrate continuously. I checked the tires and see no signs of unusual wear on any one tire.
Please keep the suggestions coming. jerboa
Please keep the suggestions coming. jerboa
Melting Slicks
Joined: Aug 2000
Posts: 2,248
Likes: 1
From: Newland US
Re: Periodic Vibration at Speed (jerboa)
jerboa,
The way you describe the vibration it sounds like it is a harmonic. I think the dealer has equipment to analyze this type of vibe.
Good luck.
Mark
The way you describe the vibration it sounds like it is a harmonic. I think the dealer has equipment to analyze this type of vibe.
Good luck.
Mark
Melting Slicks
Joined: Feb 2001
Posts: 2,137
Likes: 1
From: Oklahoma City OK
Cruise-In III Veteran
Re: Periodic Vibration at Speed (jerboa)
You can get the drive wheels off the ground and run it up to the speed where you get the vibration. That would tell you if it was something in the drivetrain, engine or rear wheel balance.
Burning Brakes
Joined: Aug 2000
Posts: 802
Likes: 0
From: Boca Raton, FL
Re: Periodic Vibration at Speed (jerboa)
I have the same problem. I replaced wheels and tires and it hasn't gone away. The dealer thought maybe a wheel bearing. Please post if you successfully diagnose it.
Burning Brakes
Joined: Aug 2000
Posts: 802
Likes: 0
From: Boca Raton, FL
Re: Periodic Vibration at Speed (Blocktrdr)
Also, If it helps. It is not forward of the tranny in the driveline. You are the first person I have seen with this exact same problem. Also, in my case it is a little worse at 75 than at 85.
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Melting Slicks
Joined: Aug 2000
Posts: 2,248
Likes: 1
From: Newland US
Re: Periodic Vibration at Speed (jerboa)
jerboa,
This is probably not the cause of the vibe, but since it is easy to check.....why not.
Make sure the differential damper is not loose. Should take but a few minutes to slide under there and give it a shake.
Good luck.
Mark
This is probably not the cause of the vibe, but since it is easy to check.....why not.
Make sure the differential damper is not loose. Should take but a few minutes to slide under there and give it a shake.
Good luck.
Mark
Burning Brakes
Joined: Aug 2000
Posts: 912
Likes: 1
From: Clinton Twp. MI USA mi
Re: Periodic Vibration at Speed (Blocktrdr)
I've had the same problem since i've owned the car. I think it is the tranny somehow. Just a very slight vive at about 75-80+. I thought it was normal tranny vibration. Post if you fing the cure.
