Sorry if this is a repeat question but i can't find the answer. Is anyone else experiencing a leaky diff? I have 4 diffs with different cst oils but they all leak from the drive cup area and the the center mesh area. If i tighten the 4 this screws too much, they will bust through the housing of the diff. If they aren't tight enough, it seems like the diff leaks much faster. I've tried the new "green" seals which seem to work a bit better but they still leak. How do i fix this? what am i doing wrong?

Also, what mods have to be done to run an Xray T4 diff? i have a few of them and they've never leaked.

thanks for the help...