I had leased a brand new 01 TL previously, and had some shift flaring going on with that car, on my way back to the dealership to turn the car in at the end of my lease period at 52k.
This tranny issue is a real bummer, there is obviously NO fix for the problem as the engineering of this particular tranny is off. Thats too bad, because it is without a doubt, one of the nicest cars I have ever driven. smooth, quick, and incredibly comfortable. There seems to be a bit LESS of a failure rate with the 4 spd in the 99, which is why I purchased a 99 to replace my 01.