Just to add to what others have posted. I found that when the caliper slides are dismantled and cleaned/regreased, you need to burp the air from the slides after reassembly.Press the caliper sides together and peel back the rubber seal - air should come out. The first time I did slide service to my rear brakes I did not get 2 miles before realizing my brakes were dragging. After that I get great mileage from all my brakes.

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