RE: Firehammer diff leaking
I'm suprised you have grease seeping out. I wonder if you have a problem with water getting inside causing the grease to seep out. I use Lucas 'Red-n-Tacky' grease on my diff gears and couldn't imagine as thick as that stuff is having it seep out. Have you disassembled the diff to see if there is water or moisture inside causing the grease to seep out?
Hey motors4fun, did you weld the outdrive cup to one of the bevel gears inside the diff? Was one of these stripped? Hadn't heard of someone having to do this before.