Vehicle will not go in gear when heater is on

Thanks for the reply! Here's another curve ball for you. It acts like the issue is in the control switch, the switch that changes where the airflow is sent. When it is in the off position the Driving Lights Go Off and you can change gears, when you are in any other position the driving lights come on, but you can't shift from park. The break lights work fine. I've never seen anything like this either. Thanks for your help.

Thanks for the reply. I was thinking the same thing. This thing is haunted. My technical knowledge is limited to AC systems and finding hidden electrical Issues. Which I believe this vehicle has. A ground issue in the wiring harness is my first guess, the PCM is my second. You have helped alot. I don't feel stupid anymore. So many times things like this are due to something simple. I will put two of my other mechanics to investigate the issue when they come by. Sometimes it takes two or three to figure out this kinda thing. I do want to tell you what we figure out, once we finish diagnostics. Thanks so much again for your help.

The second mechanic spent 15 minutes under the hood and found that the blower resister was bad causing the crazy transmission problem. Hope this helps someone :)