TCC issues are lack of maint, but more importantly (I believe) programming. Locking up the TCC in almost every gear and unlocking while simultaneously shifting and relocking asap shifting. When computers are in control of timing, throttle, line pressure, shift solenoids, and TCC. There is a lot of freedom in how things shift. But short shifting and TCC modulation 1,000 times every few miles is crazy to me. All in the name of CAFE.