My buddy just had that EXACT same thing happen to his Zuk, and it wasn't the shifter sheet. His tcase shift lever was slightly worn, and got twisted in the xfer case. We pulled the shifter out, used a screwdriver to align the two shift levers so the shifter holes aligned, put the shifter back in, and it works fine. Overall problem is that the tab on the end of the shift lever is worn, so it can slip out of place slightly and lock up the case if you aren't careful. His happened because he tried to shift the tcase when the drivetrain was under stress.