From what I have read the speed sensor on a 1990 240sx hatch is on the transmission. So if I put my auto tranny in drive and pull the car with my fourwheeler, would it register a speed on the gauge cluster and will it affect the odometer any? I need to know because I want to make sure everything is working in my car before I go much further on my work. Also, all I need is a battery hooked up with the positive and negative terminals correct?