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It could be possible, However the mechanical components are different along with the programming which unfortunately can only be done with a dealer level diagnostic tool.
So you would have to change the transfer case and related wiring and then find a dealer that would change the programming for you. More then likley they would not do such a retrofit and send you to the sales department to buy a jeep with the 4x4 system you desire
Link to jeep 4x4 differences bellow
If you have any further questions id be glad to answer them for you
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