Door adjustment is not obvious but it's very easy. Think about it for a minute. How could anyone on an assembly line install a door and have it fit perfectly if there is not a way to adjust it up, down and sideways. Here is how I do it. Put a few inches of masking tape on the body at the top and bottom and leading edge of the door strike. This will provide a reference for the present location of the strike. Loosen the 2 screws that secure the strike to the body, but keep them snug. Move the strike inwards about 1/16" by tapping the strike easily with the wrench. Take care to keep the strike horizonatlly aligned by referencing it's location relative to the masking tape. Tighten the bolts, leave the tape in place, and drive off; listen for the sound. If absent, then you solved the problem, and you can remove the tape. If it persists, then again try moving the strike inward a very little bit. If this dosen't work, then look elsewhere for the noise.

Good Luck,
Mark