Apologies I have been working on military systems for far t long with a civilian setup you would have to transfer both sets of gears in order to have them match up. Rock crawlers and other systems I have seen sometimes take a different gear setting depending on terrain.
You will have to change the front gears or you will destroy your transfer case. If you put 4.10 in the rear the front will be geared 4.09 or something similar just slightly higher (numerically lower)than the rear gear.
Unless you plan to never use the 4x4 this needs to be done.