my mounts were a kit from rocky road the nuts are nyloc they did not loosen instead they ripped through the "high performance lifetime warranty rubber bushings" and then folded the paper thin washer and sucked clean through the mounting holes after my drivers side bracket folded in half the the entire case proceeded to flip up slamming into the floor of my zuk thus cracking the case in half and the center gear fell out on the ground! im told this has never happened to anyone
i guess my 37's are hard to turn
i drilled out all the holes to 1/2" and swapped hardware out but not before
welding some 1/4" plate to all my frame mounts and gusseting the drivers side mount with 1/4" flat steel in the shape of a "T" i guess that will work for now it really needs a strap going over the top of the case and attaching to the mounts thus holding it down