Hey I saw your post on one of the blogs. You wrote you have 4:10's with a factory locker, how does that work for you? Any issues in 4WD? I plan on getting 4:56's for my truck (35's) after I get home from deployment. I have read many blogs about gears, but I cannot get this question answered... Do you need a new locker and/or differential cover when you upgrade to 4:56's?