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Theory of an Automatic 4x4 Transfer CaseMany 4x4 truck owners ask what the difference is in a vehicle with All Wheel Drive (AWD) vs an Automatic Four Wheel Drive (4WD) Transfer Case. For this topic we will keep it oriented towards later model 4x4 domestic trucks, as many cars and imported vehicles may treat the scenarios differently from a mechanical standpoint. In this example we specifically reference GM 4x4 trucks as until recent years held a majority of the market for an Automatic 4x4 transf …