Transmission Problem Fixed!
Today, Vita and I called the W.W. Williams technician at home and arranged to have him meet us at the W. W. Williams location near downtown Atlanta to purchase the new shifter module. We told him that we just wanted to purchase the part and install it ourselves to save money. No problem.
The W.W. Williams tech, Brian, met us at the (closed on Sunday) shop and proceeded to install the new shift module for us on his personal time at no addtional cost! The new module works perfectly and the shift pads are not "rubbery' like the old style module was. The new pads have a solid feel that simply "depress" slightly like a button when you press them - a much more substantial feel!
I know that some are not fans of W.W. Williams (for bus work), but I must say that based on this experience, I have no complaints!
Thanks to all of you that offered suggestions, guidance, and support!