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they make a dual transfer case for the auto only if you have a A340F tranny.


Incorrect. This used to be the case, but as Jeff mentioned, Inchworm has an adapter for the A340H now. You still have to buy the adapter and a gear drive case and figure out a crossmember though, none of which are issues with a 22RE and 5 speed combo. Maybe not that big of a deal unless you are rockcrawling though.