Not sure about Dodge, but the brake light switch on my 97 Ford moves each time the brake pedal is pressed and released. After 10 years of moving back and forth the hot wire finally broke at the switch connection and would work intermittantly. When it lost connectivity you could not shift from Park. I replaced the switch and made a new connection.
You may also want to look under the dash area to see if any wiring is in contact with any moving (brake pedal, cutch, or throttle) components during operation.
Hope it's an easy fix for you,
"You wouldn't worry so much about what others think of you if you realized how seldom they do."