I have a 03 TJ X that was built from several other TJ's
The main ecu and the tranny ecu have different vin numbers I believe.
I took it to a chrysler dealer, and they tried changing the tranny vin to the correct one, and said they couldn't.
I thought maybe it was because they didn't know what they were doing? I dont see why they couldn't do it, I figured id take it to a bigger dealer.
I figured the vin number difference was the reason the thing was going into limp mode. Does that sound right?