here's a question with the speedometer, it was stuck at 0 now it's at 100 at all times. i had my obdII scanner up and opened torque i noticed that it's reading the miles, on the ecu just fine, they differ from my Garmin by 2-7 mph so is it my speed sensors that are bad or is it another component? i know the transmission has been rebuilt, if that matters at all. the truck is a 1998 F150 Lariat 4x4 4.6L auto