My Commander has read irratically from day one (it would fluctuate almost as fast as the egt's) but I could at least get an idea of where I was at. A few days ago it started sticking at 100* periodically and now it just stays at 100* no matter what. Ive checked the wiring and connections and everything "looks" ok. What else can I check?

 

Make sure your ring terminal is not grounded to the tranny temp sensor. It has to have the fiber washer between the ring terminal and the sensor body. Perhaps your fiber washer is cracked???

 

The fiber washer is in the right place. I will check for cracks. The wire runs over the top of the Tranny. It doesn't "feel" melted (can't see it) Does the exterior of the tranny get hot enough to melt the wire?