OTTOMAN308

On the highway when I get over 65 my steering shakes violently. It only happens at high speeds. The car is a 95 C2 w/ 58k. When I bought 5 months the owner put a brand new steering rack in it before he sold it to me. Could it be a hub going bad? Any input would be appreciated.

Aaron <img src="graemlins/drink.gif" border="0" alt="[cherrsagai]" />

Todd P

When was the last time it was aligned? Sounds like that may be a possible cure if it hasn't been done in awhile

tom_993

It could also be wheels that are out of balance. Have they been balanced recently? It’s also possible to throw a wheel weight. Check for obvious signs of a missing weight (a clean spot or a piece of double sided tape with no weight on it).

Tom
'95 993

Ray Calvo

[quote]It could also be wheels that are out of balance.<hr></blockquote>

From my experience, I'd go along with tom_993. In the cars I've owned (from the 993 way back to my Austin America), doing a wheel balance has cured these high-speed wheel shimmies.

Jeff 993TT

I've noticed that if you only experience vibration between certain speeds, ie 50 to 80 mph, then it's probably a wheel balance. If the vibration is there all the time, it's probably something else.

If you want to see the reason why my wheels were out of balance, check out this site.

<a href="http://www.cuberootconsulting.com/photos/photos.php?TopicID=defective_chrome_wheels" target="_blank">Defective Chrome Wheels</a>

Jeff

OTTOMAN308

My wheels are chrome, and some of it has chipped away (very small amount). I am balancing them later this afternoon, hopefully that will do the trick.

Jeff 993TT

Make sure that your shop has the Hunter GSP 9700 (?) Road force tire balancer. It's supposed to be the best.

Jeff

C4S

I agree with Jeff. The Hunter machine places weight on the wheel as it is spun up to speed. This results in a more realistic interpretation of driving conditions. It seems to better balance the wheels than other machine I have seen.

For more info on the GSP9700 as well as where to locate one check out:


<a href="http://www.gsp9700.com/pub/features/intro.cfm" target="_blank">Hunter GSP9700</a>

<img src="graemlins/xyxwave.gif" border="0" alt="[bigbye]" />

Jan_M

I Had jittery on mine at those speeds. We did a spinning on the front wheels and discovered a flat spot, probably/certainly caused by me lending it to an uncautious friend...(bottom line is I did not pay the bill for this as well as a check up of the car and will NOT lend it again)
I had to take the car for a longer trip shortly after and it seems like keeping heat in the tires for a longer period made them round(er) again.
Maybe you have developped one.
My 2c.

Jan

HueyN

Jan and all,

I have a dumb question. What could cause a flat spot on the tire?

Thanks in advance!

-Huey

Jan_M

You can cause a flat spot by having the car sit on its tires for a longer time, and this depends a lot on the condition of the tire. Here is Northern Europe we need to jack the car up during winter storage to avoid this.
Or it can be caused while driving and hitting/driving into a hole/sidewalk at around 70 Km/h or more. This can also damage your rim, but it can be fixed.
Maybe there are more ways of damaging your tire?.
Jan

HueyN

Jan,

Thanks for your response. I was just wondering what your "uncautious" friend could have done. Now I see

Thanks again.

-Huey

OTTOMAN308

The wheels were way out of balance. Took it out on the freeway and all is well. Thanks for the input.

<img src="graemlins/wave.gif" border="0" alt="[byebye]" />