I have an 05 Screamin Eagle Fatboy with about 4000 miles. Recently I added D&D FatCat and a Zippers Thundermax Module. About a month later the speedometer began reading LOW and the mileage on the odometer is racking UP like it is going out of style! I replaced the speed sensor and there was no correction to the problem. Any other ideas other than replacing the speedometer? Anyone else ever had this problem? Thanks