It has not been discussed, but the newest run of Athearn RTR SD40s have a TSU2 board instead of Econami. Because this is a new release, JMRI has not been updated yet. I had experienced this with the most recent release of the P42s. It was not there in an older versions but appeared in an updated release.? So allow the JMRI team to get the updated info from Soudtraxx and it'll be OK.
