Definitely think it is the Axle clicking. The boots look pretty good. From my reading on the forum it feels like I should pull both axles, drain the oil and replace with new oil(gear oil?) and swap them and re-install.
Sound right?
Untitled by
ttownthomas, on Flickr
Untitled by
ttownthomas, on Flickr
Untitled by
ttownthomas, on Flickr
Untitled by
ttownthomas, on Flickr