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You can usually buy a regulator with or without a motor. Be CAREFUL as the door skin is razor sharp. You will cut your hands and arms if not very careful and even then you'll get cut. On many Ford/Lincoln power window motors they use plastic planetaries. They dry out and break into small pieces after a few years. The window will sometimes go down by itself and won't move properly when the UP/DOWN switch is pressed. Instead of replacing the motor I rebuild it by replacing the plastic planets with 1/2" long sections cut from a 3/8" shoulder bolt. I've been doing this for years on Fords.