speedo question
ok I just ran across the section on cool cats where you can make the speedo read higher. It doesnt look hard at all . What Im wondering is, How do we test the speedo without doing 199 MPH. Does anyone know a way to test the speedo's in our cars with the dash out of the car or at least without the car having to be moving? I know on the older cars with the cables we could just hook a drill up to the cable and turn it that way to see if the speedo went up. is there some way of doing something similar on ours since they run off an electrical signal from the wires coming off the speed sensor in the tranny. any help would be great and if it works I'll be extremely happy.