2 MONTH UPDATE

About 6 weeks after changing to Febi/Bilstein ATF 34608 (Shell M-1375.4 approved), I noticed my car was shifting a bit hard from 2nd to 3rd gear. Initially this hard (at times rough) 2-3 shifting was only in the AM when cold, then a few weeks later when I went on a 900 mile road trip, this rough 2-3 shifting would also occur it was warm and under higher torque conditions (uphill or with passengers). Had me concerned a bit, but I realized that I had not done an adaptation reset via software.

When I returned from my trip, I had an local independent do the adaptation reset via their software package (this is not the same as the ignition to ON, then flooring the pedal, then start sequence). Immediately after the adaptation reset, my shifting is back to normal and smooth again.

Of note, when you change the ATF in these cars, it will change the viscosity and friction modifiers with the new fluid. The car's transmission will need to a software reset to re-learn the new fluid characteristics for smooth shifting again.