While doing the brakes on a 2001 Dakota 4x4 I found that one of the bolts that hold the caliper was stripped. Apparently this is a problem with this model and maybe others. After drilling and tapping it out and putting in a helicoil, I found that NAPA sells a oversized bolt that will cut its own threads also. They are a little expensive, but well worth the $20 each.
Hope this helps
Hank