I have a 2005 auto tranny car, does the 06 already come with the 6 speed auto tranny and it this a easy swap, or does it involve many sensors ecu and coding stuff?

 

04-05 autos have a 4 port motor and 4sp trans
04+ manual have 6 port motor amd 6spd trans
06+ autos have 6 port motor and 6 spd auto trans
in europe and other countries there is a 04-05 4 port motor with a 5spd manual also

different motors, trans, ecu between 05-06 automatics