truggy diffs into Revo, what fluid weight?

[_paralyzed_]

^ what Neil said.

Shim until tight and then back off a fraction of a hair. You don't want them tight but you want as little play as possible. Do the shim dance!

Any good shim job will have you assembling and disassembling each diff several times. Trial and error are the only way to a good shim job. Set aside some time and plan accordingly. It's worth it in the long run.