if your truck was like mine when i looked inside the door when i was replaceing the door latch mech' ....everything inside there that had factory grease was dried up from age.what i did while i was replaceing the latch was to re-grease every thing like the window tracks /pivit arm / all the control rods that are attached to the latch and the inside door handle .i used mobil one sythetic grease ( red colored ) the drivers door should be door of all your doors to see the most use ,now it works better than the passenger door ...i still need to do what i did to the drivers to the passenger door because it is a little slower to orperate everything ( window , locks, etc...)