About 80,000 miles ago I did the Eldorado rear brake swap. About two weeks ago I got some grinding coming from the rear wheels and figured it was time for rear brakes. So to be sure I ordered rear calipers from Advance Auto [in case the caliper plunger wouldn't retract] and already had rear rotors and pads in my parts bin. Went to Kendalls to also do a brake flush. Discovered that a pad had delaminated and had disappeared leaving me only the mounting plate. But as long as I was there did pads, both rotors and am keeping one caliper as both rear calipers were in good working order [both sides use the same caliper as one is mounted on the front of the wheel, the other on the back]. As there was about half the pad remaining I probably wouldn't of had to do the brakes at all at 80,000 miles except for the failure of that one pad. Long life due to mostly highway miles and that the front brakes does most of the stopping. And the front pads and rotors were done about a month ago.