I'm replacing the brake pads on a 2017 RAM 2500 4wd. The fronts are finished. Found all of the pads were seized at mounting tabs and one caliper mounting pin seized. The vehicle has 64k on the original brakes. My takeaway is replace everything at 50k no matter what the condition. The rears are next on the schedule. Corrosion under the alloy clips is the biggest problem I'm having. The rust grows and seizes the pad mounting tabs.