Quote: yes,1/8 travel seems far too much.perhaps using a spacer position those pistons further out and re assemble?
Spacer??? Maybe your forgetting how a disc brake caliper work If your pistons are retracting 1/8" that's way to far. Like I stated before the seals are pulling the pistons back to far. They should only retract far enough to let the rotor spin without touching.
I think Todd nailed this correctly with his first post. I have had this happen on the rear of a 4 wheel disc dirt car but have never had it on a dodge. It only stands to reason all calipers serve basically the same principle, they're just in different configurations. Is it possibly caused by the phelonic piston rather than the steel?