5r110 to g56 swap fummy

Working on an 06 with a cummins and swapping the 5r110 to a g56 , trying to figure out the wiring and how to go about it as far as getting the truck to start and the electronic transfer case to shift, i am using the factory 273f tranfer case , i swapped the 29 spline input into it to go up to the g56 just need to figure out how to make the truck tjink its in neutral so it will start and go into 4low anyone have any idea?

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Pmd u