Jeep 2008 Liberty - Manual (Page 386)

Spare Tire Stowage
The spare tire is stowed underneath the rear of the
vehicle and is held in place by a cable winch mechanism.
Spare Tire Removal
Fit the jack handle extension over the drive nut. Use the
Lug Wrench to rotate the nut counter clockwise until the
spare is on the ground with enough slack in the cable to
allow you to pull the tire out from under the vehicle.
Lowering/Raising Spare Tire
386 WHAT TO DO IN EMERGENCIES