i have never heard of this lime bucket thing in welding a diff, and i weld for a living. whats the point? with a proper preheat (no need for more than 500 degrees, much cooler than red hot) and proper weld technique, welding both the spiders to themselves, and to the carrier, i cannot imagine a diff welded this way breaking before i would bend a housing, blow both shafts, and sheer the wheel studs off. please elaborate with this lime crap. i will soak mine in acetone or MEK, let dry, and start welding. i take breaks every other bead on the gears/ carrier, and let it cool down some to reduce warping. i still have not had one of my welded diff's break under hard wheeling conditions, and i am yet to preheat a carrier/ spiders. i start with the spiders, work my way out, and weld completely. i also watch very carefully for discontinuities.