Who did your locker install and have any problems with the new 8.2" rear diff? I'm waiting to regear with 4.56's the same time I get lockers. Nitro gear is supposed to have one out within the month and put me in contact with Just Differentials to pre order one. They will be in the $300 range instead of the $800 Toyota wants.
The front locker was installed by a local off road shop, but the rear was done by ARB (their North America facility is here in Washington state), to validate the new model for the 5th Gen. Both are working fine.
I did need to remove the rear breather check valve and replace it with an open ended elevated hose. The check valve apparently allowed slight pressure to develop in the housing, forcing some oil back up the locker's actuating air line.