Did this just start or started AFTER the front shock replacement , or After the alignment ?
Was the shocks and Alignment done at the same time ?
Have the tires check for balance sometimes its takes more than just the standard wheel balance. The technical name escapes me right now.
Had the tires rotated and balanced on our Toyota FJ,, around town or under 50 mph didn't notice a thing.
Freeway speeds shimmy came in at 60 mph and seemed to disappear at 70 mph.
They did the other wheel balance and now the shimmy is gone.
Reason why I ask if this started after the shocks were replaced , who did them ? If done at a shop ? Maybe a wheel weight was knocked off and wasn't noticed ?