gearbox

Hi guys,
as i was returning home last nite, suddenly there was a "clunk-clunk" sound continuously the higher i rev the higher the sound become & also my steering becomes heavy.......i tot farked man, not my gearbox again........or worst timing belt putus........so then i searched for the problem & sound....finally found it....my crank pulley was wobbling....& the screw attached to it (the 1 need to open when changing the auxilary belts & timing belt) was cracked.........

so wat could the...