> wrote in message
ps.com...
>> My 94 convertable starts to vibrate around 65 mph.
>>
>> Feels like it is in the back of the car. Can feel it
>> through the gear
>> shift, so could it be drive shaft? Car is just at 100K.
>>
>> Recently acquired the car, first vette, so no history on
>> the car and not
>> sure where to start looking.
>>
>> Is this a common problem, or do I just go through the
>> check the tire
>> balance, rim straightness, etc. routine?
>>
>> Everything feels tight. No clunking on acceleration or
>> deceleration, so at
>> this point I don't suspect U-joints.
>
> I'd like to hear from someone with a late model C4 that
> has
> absolutely no vibration at 65-75mph like my 2003 C5. I've
> fought with
> vibration in that speed range since my 1996 C4 was new,
> it's about
> 115K now. It seems like there's a body resonance that is
> always there
> but strongly magnifies any problem. Mine seems to be
> towards the
> front. Wheel balancing and tire changing make a
> difference but don't
> eliminate the problem. The last round after the vibration
> got worse
> replaced a worn ball joint which helped a lot. I drive
> the C4 to work
> twice a week and the 65-75mph vibration is worse in the
> first few
> miles and calms down as the tires warm up. It's almost as
> if the
> tires take a set when they sit like old nylon belted tires
> did. This
> is the same for Goodyear GSC's and Firestone Firehawks.
> That being said, there are a lot of things about my C4
> that I like
> better than the C5. By all means, have the items
> mentioned elsewhere
> in this thread checked in case there is something that
> needs attention
> but don't worry about a little residual vibration.
> Nothing I've ever
> driven is as comfortable cooking into a turn as a C4.
> Enjoy your new
> vette.


I had the same problem with a 75 vette at one time.
I found a place that still balances the tires while they
remain on the car.
that balances the rotor and all.
they solved my problem...

g'luck
--
'Key
=====