bluesman Try getting in your truck cold drive somewhere without using your brakes,carefully roll up to a curb or something to stop you get out and see if your drums are warm/hot. If they are warm/hot back-off adjustment. As was said be sure park brake isn't the culprit. when you get on a slight slope and let the pedal off will it roll back ?? It should--if not brakes probably too tight !! Also if you smell them as in hot need loosened-up ! Dought if it's rough roads where I grew up the wash boards were terrible the trucks got thru that.