I posted this comment on another thread, but thought I would put it here and see if anyone has any information: I have a question...has anyone tried converting the hydraulic fan on the earlier models to an electric from the 03 and up models? I wonder what would be involved. I would think you could use one of several types of controllers...doesn't have to be the PCM that controls it. But I wonder what would happen when you disconnect the hydraulic controls. Would it throw codes? It seems to me that converting to the electric fan would be a far superior fix than repairing/replacing the trouble prone hydraulic unit.