Well ... the issue of change is no greater complication while using a Dodge Ram gearbox, the only thing that should be taken into account is whether the vehicle's computer has transmission or vice versa. If the transmission has nothing to do with the motor computer, it should not have a problem to start.
It is true if the box has an electronic command by ECU, or the ECU takes parameters of it you will have gas and power problems, since the computer works in a state of emergency, you will not have problems, anyway if you put the mechanical box the vehicle the vehicle will walk anyway but I do not know if the gases and the power will be the necessary real.