[jgrice]

Gents,

Some of this could have been already covered but I wanted to share my experience/remedy with this issue.

My car is old - 186. I have the original goodyear gt yellow letter tires.

Had the same vibration that sets up in the 60s and settles down. Before the remedy it did it all the time and it was an announcance.

What I did was:

Had the tires tested for runout. They are very bad but I didn't want to give up the vintage yellow letters.
Instead of 18.5 lbs I have running 28.5.
Had the car 4 wheel aligned. Twice. Having a pro shop very experienced in 4 wheel alingment made a huge difference.
Tighthened the adjustment on the streeing box to the max.

The results:

I get it the vibration sometimes...not all the time now.
It is not nearly has bad as before. I suspect if I had round tires it would be fine
When I get it now it is a very percise speed and leaves versus hanging around from 60-70.

That's my report.

Best,

JEff