Originally Posted by
bballer182
It would be awesome if there was just a looped wire from one pin to another on the TCM, but im sure that isn't the case. A new OS is probably in order to fix that, but as you you know EFILive doesn't support Allison TCM full flashing.
The TCM is locked in T/H mode to keep the converter from getting fried, because they are Medium Duty truck meant to haul stuff. And there has been somewhat of a demand by the "little men" of the world who feel they need to daily drive them and would like to have T/H mode disabled so the fuel economy isn't in the shitter all the time.