so that means: if you are driving on 2nd gear at 5000 RPM and want to down shift , the rpm after downshift won't be over the rev limiter however, i found myself unable to downshift to 1st gear from 2nd gear if i am at around 5000rpm . at first I thought it is a f1 pressure issue, i.e. at the moment of downshifting, i happened to have reached the lowest of the f1 pressure thus unable to shift. Alas, that's not the case, as i tested with my leonardo hooked. i am guessing either it is a feature of the TCU ( 251619) or my gearbox/f1 system had a problem? can someone confirm this?