Got to honestly say these things are literally sandwiched between your hub carrier and your beam with 4 bolts torqued down. If that stuff was going to move it would move stock. plus the holes are not slotted so how can it move?
I also think he is right about just reseating the
abs sensor bolt. plus if there was going to be deflection aka movement in the sensor again it would happen stock. His theory is pretty solid IMO. Again the
abs sensor bolt is not sitting in a slotted hole. So movement would not be an issue. Also you are spacing the sensor bolt not the sensor.
I will be putting a set on my car shortly not sure how soon it will be till I get to the track though.
Interesting so these shims were on the top only and not across the complete carrier surface? How much negative camber were the shims supposed to give? I do think that the shims only on top was what caused your issues.