[namba209]

Ray, I'm by no means an expert on trannies, let alone an auto, but, from what I've seen watching the pros teardown my trannies, I've noted there is an arm with teeth on the end that meshes with the final drive gear, effectively locking it. Much as I hate to say it, the arm or how it's attached to the activating mechanism may have sheared a pin that holds the two together, so the tranniy will have to be removed and opened up to fix the problem.