I just got my rig, and It suffers from the exact same problem. I, too, am also a factory trained mechanic, but I don't work on cars for a living anymore. I could easily order up whatever special tools I need and dig into this transmission. But I'm choosing to go the other route. I'm letting the reputable transmission shop down the street rebuild my unit. These units need valve body overhauls and tail shaft bushing updates, may be a cable update, also? My machine shop is redoing my long block. I don't want to do this twice. We'll see how things turn out in a couple weeks. Good luck to us all!