Had no better economical choice than to replace the tranny and torque converter. (Repair would have cost more.)
The original torque converter was fused so tightly to the original tranny that my mechanic couldn't readily separate them. (He didn't want to get too rough since he knew I needed to return the old one to get my core charge back from German Star.)
Ron at German Star was GREAT: very knowledgable and honest to deal with. My tech was very impressed with the quality of the rebuilt tranny, and the net price of the tranny and torque converter I purchased was very fair. On the basis of my experience, I can recommend Ron and German Star to you without reservation.
I did have an oddball problem when installing the new parts which I detailed here:
http://www.peachparts.com/shopforum/showthread.php?t=118952
After dealing with this situation, everything is cool. The car drives like new once more, and I'm good to go for the next 250,000 miles