So the speedometer doesn’t work in my 97’ SVX below 45mph. It moves but bounces around about +- 5mph of the actual speed until it gets above 45 mph and then it works fine. I plugged my code reader into the OBDII port and the live data speed varies below 45 too. I’m guessing it’s the gear in the transmission that’s bad? I pulled the speed sensor and it looks good. Does the OBDII get its info from the gauge cluster or the sensor?