factory, the previous owner of my truck ordered the truck like that, go figure, i like it tho. turns out i cant use either axle, the 12 bolt is in fairly decent shape, its just the gears are wrong, and the front is a 10 bolt and the same ratio as mine, except it worse condition /forums/images/graemlins/crazy.gif, now i gotta go to a salvage yard again and look around, oh this is so much fun i think im gunna SCREAM /forums/images/graemlins/eek.gif