The kid has this on the back of her '08 JKU. The latch mechanism is junk. Even with the pin it there is enough play in it that the carrier will swing open at any time. I have a plan to fix it. Cut a .25" plate to create a stick. Drill a hole through the tire carrier just beyond the latch. Bolt the stick behind the tire carrier and let it rest behind the latch post. it will act as a lock to keep the tire carrier against the post. Flip it up and unlatch the carrier to open.
Anybody else doing anything with this setup? Is this a known issue?