I have been dealing with a sticking right front caliper on my 1998 Frontier for the last three years. I have replaced calipers twice, front wheel bearings, flex brake hose, and the master cylinder and still experience occassional caliper sticking. It has been happening lately after the truck has been setting for a few days and within the first five or ten miles. The problem then goes away. The right caliper has always dragged more than the left side. Almost forgot have replaced the rotors too. All parts have been from Carquest Dealers or Nissan OEM parts. I am wondering if the spindle or something in the caliper mounting is misaligned or warped.