Quote Originally Posted by AllanS
Well, they said that the wheels are fine, and the tires don't have any flat spots in them, so I'm going to take a look at adjusting the steering box as the first point of attack. I messed with it a few weeks before and was able to eleviate the shimmy, at the risk of lack of feedback above 45mph.
I've found that these cars are very sensitive to tire health: balance, inflation, treadwear, etc. You can dis- and re- mount the tires and make sure all the mating surfaces are clean and flat, even check runout with a dial indicator if you have one. Then have a good tire shop do a high-speed balance - I swear I've had more "suspension problems" that turned out to be "tire problems" than anything else.

HTH

- Robin