My rear pads had to be replaced fairly quickly after I bought the truck. I'm still not sure why. When I replaced them I also cleaned and regreased the slides. After re-assembly and a short drive my disks were sticking and super hot. After they cooled and I limped home I took the lot apart again and found when I assembled the slides I needed to burp the air out past the slide boots. The air pressure inside the slide bores did not allow the caliper to release fully. FYI

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles