I left a message on the Eco Cycle support line last night and by noon today David Hall returned my call and had all the answers I needed. Good guy, good company.
I just installed the newly offered TSDZ2 from David Hall in Nashville, TN. They have changed out the stock gear and added some heat dissipating.
Anyway, after installing I tried to turn the pedals by hand to check the shifting. Very, very difficult to turn the pedals by hand. But the motor works. Is this normal?