vibration over 60 mph
Racer
Joined: Nov 2008
Posts: 321
Likes: 2
From: Auburndale FL
I have similar problem on my 87, slight vibration at 70-80. Haven't found it yet, not sure if it is a tire, wheel bearing, u-joint, etc. Just a noticeable vibration. I hope someone can help us with this one.
Instructor
Joined: Mar 2009
Posts: 126
Likes: 1
From: Newington CT
Try getting the tires and wheels balanced to rule that out.
It's inexpensive and if the vibes are still there you know it's something else.
Have all steering, suspension and drivetrain parts checked while the car is on the lift too.
It's inexpensive and if the vibes are still there you know it's something else.
Have all steering, suspension and drivetrain parts checked while the car is on the lift too.
Intermediate
Joined: Mar 2009
Posts: 30
Likes: 0
From: Brownsville Texas
I had that problem as well. It was a vibration (bouncy feeling in the back part of my vette). For me it was the u joints. You should also look into getting what is called a road force balance. They do that at Discount Tire Co.
Racer
Joined: Apr 2004
Posts: 306
Likes: 0
From: Cotati CA
I had the same issue, got the tires spin-balanced and that did the trick!
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Drifting
Joined: Jun 2007
Posts: 1,261
Likes: 2
From: Prather, California -1990 ZR-1 White/Flame Red- -SOLD!!-
I had the same issue, once I got to around 75mph I would start feeling vibration. Not real harsh, but definitely there. Once my new tires were installed and balanced, no more vibration, nice and smooth! 
Instructor
Joined: Mar 2009
Posts: 126
Likes: 1
From: Newington CT
Probably wouldn't be bad idea to have them all done.
As for how easy or hard they are, that depends on your ability.
U-Joints can be very frustrating for those who have never changed them before, and it helps to have the right tools to do the job.
It's easy to screw up the U-Joint when installing them due to the bearings falling out of place, patience is your friend with this job.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
I have an 86, and 2 of my wheels were originals that were egg shaped on the inside diameter. I changed wheels, and problem gone.
If you determine that you have bad wheels, I may have a solution.
If you have an 84-87, I have a set of nice polished aftermarket inexpensive wheels that will get you by till you save up for an expensive set. $350 plus shipping. These were on my car that fixed the problem.
I now have saved up and replaced the interim set I installed, and now they are ready to save someone else.
If you determine that you have bad wheels, I may have a solution.
If you have an 84-87, I have a set of nice polished aftermarket inexpensive wheels that will get you by till you save up for an expensive set. $350 plus shipping. These were on my car that fixed the problem.
I now have saved up and replaced the interim set I installed, and now they are ready to save someone else.
Last edited by coupeguy2001; Apr 11, 2009 at 11:15 AM.
Thread Starter
Instructor
Joined: Feb 2008
Posts: 170
Likes: 0
From: hopatcong NJ
vibration
i had brand new wheels and tires put on and i still have this problem, maybe it is a u-joint or an off balance drive shaft...whats this road force test, never heard of it?
