FIAT 500 - Updated software for Auto box - Barry Boy

Does anybody know if there is an update for the software controlling the auto gearchnging on the 1400 cc Fiat 500 '59 reg? If not, will getting the engine re-mapped do the job? The existing algorithm is useless in traffic, with the box hunting up and down, and always too slowly for the other vehicles. I am forced to overide the auto with manual to keep up.