Well, the new torque converter got installed on friday (yes, it was the new model converter)! I believe there must be a "break-in" period, because for the first 150 miles, the torque converter seemed almost RELUCTANT to engage! But soon after 150 miles on the new converter, it started acting properly! Now, except for some minor miscues and occasional little grumbles, she's shifting beautifully!!! And now I rarely even touch the Tow/Haul switch!!!