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RE: steering oscillation 90-120 Kph

I agree with Aleksander's diagnosing procedure.  Another thing it 
might be is the tire itself.  It could have a high lateral force or 
lateral first harmonic non-uniformity.  Try to target which tire is 
suspect and replace it.  The speed range that the distrubance 
happens would lead me to believe that it's a lateral harmonic 
problem if this has been happening since the tires were new.

Rudy C.
Akron, Ohio
87 5ktq
97 a42.8q
83 928s
70 dodge challenger
96 triton jet ski trailer - For Sale

> Solomon wrote:
> 	>I still have the steering oscillation between 90 to 120 Kph.
> It makes
> 	>no difference whether it's going straight or turning,
> acceleration or
> 	>slowing down.
> 	>I have checked the tires so many tires. I believe they are as
> balance as
> 	>they can be.
> Are the rims straight too? When diagnosing problems of this nature I
> found replacing one wheel with a compact spare and going to the test
> drive (the compact spare is so narrow it gives almost no noise and is
> usually in good condition). Don't make sharp turns at 120kph with the
> compact wheel installed, though
> 	>I also have a mysterious "clunk" from the back.  My local
> mechanic has
> 	>checked out the shocks;  he thinks they are OK.
> What about rear diff mounts?
> Aleksander Mierzwa
> Warsaw, Poland
> mailto:alex@matrix.com.pl
> 87 Audi 5000CS turbo (mine)
> 88 Renault Medallion wagon (mom's)
> 91 mountain bike (just in case both cars broke at the same time :-)
Rudy Consolacion
Senior Engineer

Kumho Technical Center
3500 Embassy Parkway, Suite 150
Akron, OH 44333
Voice:  330-666-4030
Fax:    330-666-3972
E-Mail: rconsolacion@kumhotech.com