my electric speedo is acting funky. It just up to 40mph when im just rolling in my driveway. everything is wired correctly as far as i can tell, ive been through the system may times. Is it possible i just got the wrong sending unit with the trans? like one with too many/too few ppm? It came from Fortes parts connection, so i will be calling them this week to ask, but wonder if anyone else here with the tko600 has had this issue

thanks
Phil