I have a 2002 Jeep Wrangler. Lately my speedometer has been acting weird. I can be at a stop in park and the gauge will bounce all over the place. This also happens when I'm in gear driving down the road. I have unplugged the sensor that is located at the rear of the transfer case. The gauge still bounces around. Does anyone else have an idea what this could be and what I can i do to fix this problem. It's also messing with the shifts at some points. I also unplugged both the PCM connection and the speed sensor to test the wire to see if there was a problem before I cut into it. We found no problems. Also had to disconnect the oil pressure sensor due to it runs on the same power wire. With that said we are leaning toward the PCM connector not making a good contact between the harness and the white shield that goes into the PCM or it's a problem with the PCM which will be the last thing I change due to the cost of it.