[Ajolives]

I’ve had this on and off over the years, seems to be no rhyme or reason. I’ve noticed if I load the steering before going on to the highway, aggressively swerving left and right in the on ramp it reduces the shimmy dramatically. Changing lanes does bring it back sometimes or makes it go away, which could support the wheel asymmetry theory.

I’m starting to suspect steering rack or weak power steering pump. Also I remember way back mine didn’t start until after I replaced my engine mounts, I didn’t disconnect the steering intermediate shaft connection possibly created some slack.

Or could be a combination of age wear and tear.