"guy with the crazy Jeep"
I’m going to give the mechanic the benefit of the doubt. Some of the 05 to 2010 Jeep grand Cherokee‘s had an issue with that particular part and it required reprogramming. If it’s not that, then it’s the transfer case.
At this point it’s worth a shot. It makes a little bit of sense to me because whatever is telling the transfer case motor how much to turn and engage the clutch is for the front is not working and it is fully engaging in the clutch pack Inside the transfer case.
Don’t you find it odd that you are the only one having problems??? It’s every other problem, not the guy you had rebuild it...
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