here is what im thinkin. (just a theory) the ecu does control the rev limit BUT the tcu controls shift points so it does no good to have a high rev limit if you still have to shift at 6,400 rpms. If this is right i would be curious to know if the mtx ecu would work cause then all we would have to do for the afx ecu to work would be to figure out how to raise the shift points on the tcu.