I am about to install a dakota digital speedometer recalibration unit but was looking for some advise prior to starting into things. I was wondering what the location/colors of the speed wires from the transmission and to the speedometer, I have read several different colors but no definitive answers. Is it as simple as just cutting the speed wire going into the back of the speedometer and running the signal end to the new unit then from there back to the speedometer? Of do I need to get the wire from the sensor on the tranny as well? Any help would be great. Its a 2004 limited 4x4.