This is topic Steering Wheel Vibration in forum Tech Talk at Northern California Ford Owners  .


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Posted by PeninsulaCOBRA (Member # 5549) on :
 
1999 Convertible Roush.
at 42-52mph it vibrates.
Rims are not bent, rotors are new.

I dont get it? ANY idea?
 
Posted by RacerX (Member # 11046) on :
 
Tires are possibly out of balance .
 
Posted by KevinK (Member # 9234) on :
 
Flat spots on the tires from sitting?
 
Posted by Santos1986gt (Member # 10513) on :
 
Get the tires balanced.
 
Posted by fredfifty (Member # 10320) on :
 
are the rims balanced? maybe weights flew off...FYI put the best balanced wheels in the front.

Or possibly your driveshaft took a dump...
 
Posted by Camara90 (Member # 134) on :
 
Check your ball joints. My car had a similar vibration from worn ball joints.

[ August 25, 2011, 12:42 PM: Message edited by: Camara90 ]
 
Posted by wilber650 (Member # 10360) on :
 
quote:
Originally posted by Santos1986gt:
Get the tires balanced.
+1
 
Posted by Luke87GT (Member # 21) on :
 
Anyone of these things can cause steering wheel vibration/shimmy

1.) Tire/wheel balance (most common) -> Some of the cheap replica wheels are tougher to balance due to lower quality control measures

2.) Inner/outer tie rods

3.) Rack bushings

4.) Control arm bushings

5.) Balljoints

6.) Worn Rag Joint

7.) Believe it or not, faulty struts/CC plate bushings can cause problems too

Since it is at a specific speed, my vote is wheel balance... And just because the machine says it is balanced, does not mean it is completely balanced. They make loaded balancers which will be more revealing than an unloaded balancers...

I once had a set of replica wheels balanced, and the problem was still there. Tried a friends OEM set of 03 Cobras, and the problem went away... I am pretty weary of overseas produced replica wheels in general.

Hate chasing steering wheels shimmy.
Best of luck.

[ August 25, 2011, 02:27 PM: Message edited by: Luke87GT ]
 
Posted by Luke87GT (Member # 21) on :
 
Forgot to mention, first check that tire pressure.

I once had an issue with steering wheel shimmy after installing new tires. I noted that the tech put 35psi in one tire and 50psi in the other.

When I evened both out to about 33psi, the shimmy improved noticeably.
 
Posted by PeninsulaCOBRA (Member # 5549) on :
 
slapped $1300 worth of new tires on and BAM the shakes are GONE thank goodness
 




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