It sounds like you're also experiencing the "bang" shift as well. There's a thread in the Transmission forum about how to fix it, but basically there's an updated TSS (Turbine Speed Sensor) that you can get for less than $25 that will prevent the ATX from bang shifting when you let off on the accelerator right before a shift. The part is cheap and the procedure is easy, so head over there and take a look. Don't forget to get the correct part number for the new TSS, which is in the thread.
