Yes, the jack and spare tire could cause a noise if the securing knob(screw) is loose or if the movable part of the tire wrench is hitting something. But inside the tailgate itself is a solenoid. This solenoid has a movable part of course and I noticed that it is not noise isolated. And don't forget the rear plates. I added screws to the lower section to secure mine. My plates are now noisefree now having 4 screws instead of only two like most cars. I hope this helps. I have been tinkering with cars since I was 12. And oh, check the tailgate speaker. I'll try to find the best way to isolate the solenoid and make it noisefree. And yes one more thing... the rear spoiler where the third stop light is. If you find the source of your noise please let us know. Tks
And, oh another thing. The mid passenger seat belt mount can make a clunking noise too. This is the swivel mount above the subwoofer speaker location. I hope that helps.
Last edited by jeepney_driver; 04-19-2015 at 06:26 AM.
Reason: added info