It took me longer to find enough time to post this reply than it did for me to quiet the rattle. Being so loud and high-pitched, I never considered the rattle was coming from the heavy swing-gate door itself.
When I re-read Eddo’s post while staring that the Jeep it all made sense.
Eddo wrote:
They all rattle a little because it is heavy and the spare tire adds even more weight. The gate starts to sag a little over time. If you adjust c-shaped cup piece on the gate, the locking mechanism, and the plastic guide/bump stop (next to the tail light) you can make it a heck of alot better. Just have to play around with the adjustments.
The first time I read his post I visualized the latch mechanism and the metal catch loop it locks to, I did not see a simple and safe way to adjust either. The “c-shaped cup” mounted to the door’s edge has angled ends that ride on the “plastic guide/bump stop” and guide the door into proper alignment. The “plastic guide/bump stop” is your adjustment point.
There is a slotted metal shim behind the guide and the bolts holding both into place are 1/3 the size of the hole in the guide. I tried putting the guide in several different positions before finding the right one, which for me was centered top to bottom and as far to the rear of the vehicle as possible. The door shuts like new and does not rattle, regardless of the size of the bump or hole we hit.
I realize this will not be a permanent fixed; as soon as the door sags more I will need to find another adjustment.
This solution worked for me and I hope it would work for others as well. If I am not making this clear enough for someone, please email me and I will gladly send pictures. Thanks to all, especially Eddo!
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2004 KJ Sport 4x4
Mopar tow package, Off Road Group, Selec-trac
All-J Products Boulder Bars and Super Skid
All J Products Frankenlift
General Grabber AT2 245/75-16
http://www.cardomain.com/ride/2649833