To all those that have the extended lenght high roof transits, on my transit i found these cracks at the bottom corner of both the rear tailights, several other friends of mine that have extended lenght high roof transits have found similar cracks in the same place. I am not posting this post to alarm you. But its better to check your transit as rust could develop if not taken care of, for now i sprayed a bit of wd-40 and coated the crack with grease.