any suggestions on what to replace next on the braking system?

What is your question?

I have replaced the rotors and pads several times (even tried cross drilled rotors). I have now replaced all 4 calipers. At first, grinding stopped but after only 100 miles its back to making the same old grinding sounds. Any suggestions on what to try next?

What makes this problem better or worse?

all the time

How long has your 2011 Ford Explorer had this problem?

has 82000 miles now started around 30000