I just added original Dynamat in the rear gate and all 4 doors. It appears that the vibrations in the rear doors may in fact come from the locking mechanism found in the latch area. There appears to be a significant amount of play there and it would not suprise me if that is causing the rattling. I placed Dynamat across the upper and lower portions of the door, as well as inside the door where the speaker is. The install is not for the faint of heart, its easy work but time consuming if you want it done right. Give yourself enough time to figure out how to remove the trim panels...
- Anton