I'm sharing this to assist anyone that may have experienced any of these problems. 1. I had a code for cylinder misfire on cylinder 5. Changed the coil pack and plug with no change. The car definitely had a misfire and running rough. 2. The AC super working with the ac switch. Wired it to battery to see if the compressor was OK and it was fine.. Just not coming on with the switch. 3. The transmission had trouble in the overdrive gear. The car would start jumping/shuddering when it reached the shifting point of the overdrive gear. Got 4 different mechanics to check the car out with all different diagnosis that did not fix the problems. I then broke and took it to Ford and was told that it was the PCM. I purchased a new PCM, had it replaced and programmed and to my surprise this fixed all of the problems stated above.