We took the left "console" apart this afternoon and removed the shift selector module to try and clean any contacts on the shift pads. Unfortunately, what I found is that the shift selector module is a sealed box without any way to access the inner workings, such as the backs of the shift selector pads. I unplugged the module, did my best to clean the contact pins that the harness plugs into, put it back together and crossed my fingers. The unit functioned (or didn't function, as it were) just as it has since the problem began. To wit - all the selector pads respond appropriately to a push of the finger except the "D" (drive) pad. Fortunately, the "D" pad can still be selected by using the blunt end of a writing pen to depress it. I guess that seals my fate. I've got a call into the W.W. Williams tech/mechanic to arrange to have the shift module replaced. I don't know what else to do and I'm loathe to depend on the "pen poke" work around as a long term solution. It would be just my luck to have that little trick stop working at a most inopportune time!