Porsche Repair Questions? Ask a Mechanic for Answers ASAP
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Usually the transfer case control module is not interchangeable with another module as the module is programmed to your vehicle for proper operation.If it is the same part number module it can be swapped over in some cases but a dealer would need to program it to work properly.
See if you can rotate the shaft on the transfer case to line up the splines on the new motor as sometimes this needs done.The instructions to replace this motor on your transfer case calls for you engaging low range on your shift controls then removing and installing the new shift motor.If you are unable to install the old motor and shift into low range then remove and install the new motor then with the old motor removed see if you can shift the shaft on the transfer case without chewing up the splines using a wrench or similar to line up the splines on the new shift motor.