Jeep Wrangler 2013 User Manual page 90

UTILITY
You or others could be injured if you leave the vehicle unattended with the transfer
case in the N (Neutral) position without first fully engaging the parking brake. The
transfer case N (Neutral) position disengages both the front and rear driveshafts
from the powertrain and will allow the vehicle to move, even if the transmission is
in PARK. The parking brake should always be applied when the driver is not in the
vehicle.
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WARNING!