Well, I know it's bad if the output shafts are wobbly on the differential. But I shimmed them correctly and followed both these posts.
http://www.team-durango.com/blog/200...-perfect-diff/
http://www.team-durango.com/blog/201...box-pro-build/
After I finished building the diffs the output shafts were not wobbly at all. But after running two packs throe it, I can wobble them side to side and up and down.