1999 Pontiac Grand Am Steering Shimmy

GMC
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BNGFAN1
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  • 1 POST
I have had this problem for about 2 years now. This occurs during driving and not braking. As soon as I get to about 70mph my steering wheel shakes and my seat starts vibrating. I have had several new tires put on and balanced / aligned and it doesn't help. I have had new brakes and rotors installed and that didn't help. The rims are not bent and are stock. I have checked the tire pressure and that is good. The suspension has also been checked. I just can't get rid of this shimmy / vibration and really don't know where to turn next. Could the struts be good enough to align but starting to go bad that they cause a shimmy? Maybe steering linkage or replace the hubs? How can I check these 2 things to see if they are bad? I have a 99 Grand Am GT with 80K.

Any suggestions would be greatly appreciated.

Thanks.
May 12, 2006 at 4:00 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
It looks like you have covered all the bases except the axles. A bad CV joint will cause a shimmy. I have also seen a problem on the rear suspension and or tires.rims that makes the front shimmy. Good luck
May 12, 2006 at 6:04 AM
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Suggested Repair

Inspect the CV axles and joints for wear. Also check the rear suspension and rear tires and rims, which can cause a front shimmy even after front tires, alignment, brakes, and suspension have been checked.

Conversation Summary

The owner of a 1999 Grand Am GT reports steering-wheel shimmy and seat vibration around 70 mph while driving, not while braking. New tires, balancing, alignment, brakes, rotors, and suspension checks did not help. The expert suggests checking the axles and CV joints, and also the rear suspension or rear tires and rims.

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