I have a 95 V6 5 speed. My speedo will on occasion creep up to 120MPH while at idle. Then once I hit 50mph it will reset. I purchased a cluster with 36k on it, put it in and something sparked. The speedo will not work. Just all the other guages are working. Im pretty sure by the looks of the face and the layout it is a post 98 cluster. Is there anything I can do...or just deal with the MPH creep?