I swapped transmissions in my FD. The trans I put in has no speed sensor because the car it came from used abs sensors for speed signal. I wired in a Dakota digital sgi5e box and wired in my front ABS sensor for a Speedo reading. I ditched the ABS on the car so just the sensors remain. The Speedo works beautiful up until 80km/h (jdm cluster), then drops to 0 until the car goes below the 80km/h then the Speedo picks back up. Any ideas? Any help is greatly appreciated...