It's a 96 jeep Cherokee I6 with the NP231 TC. One day while driving the speedometer just stops working out of nowhere and soon after the check engine light came on. After reading through NAXJA and Jeep Forum I found that I should replace the speed sensor, so I did that and the problem still persists. after that I did some more reading and it said it could be the gear, I checked it and everything was okay! I inserted it back properly aligning it. Then I read about loose grounds and bad connections. So I pulled the gauge Cluster out and sanded an tightened the 3 bolts holding in the speedometer gauge assuming they were the grounds. Put everything back together and still check engine and speedometer still doesn't work. I know this is the Comanche forum but I've looked everywhere and decided I would start a thread here cause you guys seem to know your stuff a lot better! Any help would be appreciated! As always thanks!