Not "lockers" but i have front and rear detroit truetracs..i had run lockers/welded on previous rigs and figured i would give these torque biasing diffs a shot for the daily driver, so far they have never missed a beat, invisible on the road and deadly in the bush. i dont think i will ever go full lock again unless its a bush only rig OR my future vehicle is equipped with a manual trans, Auto and truetrac's = GREAT driver/bush machine.