Re: Bad vibes

[Mitch Loescher <Loescher@tamu.edu>]

>Given a cold car and a cool, rainy day (wet roads and
>damp car) the steering wheel will shake, as if the front
>wheels were badly out of balance, when the car is
>driven at about 63 MPH. The shaking will last anywhere
>from 10 sec. to several minutes, and then subside, not
>to return until the car is cold again. If I speed up
>or slow down, the shaking increases (or decreases) in
>frequency slightly, but vanishes below 60 or above 65.

Only things I can think of are the things connected to the steering that you
haven't looked at:

steering rack - adjusted for no slop?
wheels - runout spec ok?...no wheel damage/bent/out-of-round?
front wheel bearings?
Brake disk runout?...no warpage?

You could test the wheel hyprthesis by rotating wheels front/rear to see if
the problem disappears or moves to the rear.

The cold/wet symptoms make me want to focus on the brakes, especially the
disks.  Have they been turned down (if they can be) since the problem showed up?

 - Mitch Loescher