I received the A/T Mode switch from Brokeback yesterday. It officially does not plug and play with a Gen2.5. There is a 4 pin connector available in the truck, however the A/T Mode button is looking for 5 pins. It actually does plug in but functions exactly like the HOLD button.

Next I will try to trace the wiring for the 5th pin and see if I can add that to the 98 TCU or if I need to use an older TCU.

You guys might think I'm crazy, but my GEN2 in PWR mode was much more pleasurable to drive than it was in ECO mode. My Gen2.5 feels like it is stuck in ECO mode all of the time. I will probably not be able to investigate this issue further until next year though, so it will be awhile before I have another update.