i have tried with three different scanners and there is no codes for the tranny

now i can turn the key on pull the number 17 fuse for the tranny and push the overdrive button once and put the fuse back in and overdrive works all day long until i shut it off
and then i have to do it again , can anyone tell me why this is making it work like that, can it be a fried ecm ?

Could be a kind of relay that controls that switch. My dads excursion v10 but same trans idea was shifting funny.