[DrLizardo]

Once you get to the end of one of these ordeals you feel so much smarter then when you started!

The problem turned out to be a wire in the spade connector going to the shifting module not properly seated.

I ended up taking it to the delar to figure this out, they can access the codes from the computer to have an idea where to start. Without a wiring diagram the technician did clarify the components and system operation. There is a encoder module/computer that controls the shifting module. This was suspected as being bad from the code that it was receiving. However upgrading the encoder moduled didn't fix the problem, so the tech had to get into the system a little further until he found the bad wire.

FYI, these are Feb 2007 prices at the dealer in Tucson:
$45 for initial troubleshooting and reading the codes.
$94 to upgrade the software in the encoder.