Insufficient spring or damper force often results in suspension travelling to full bump (metal to rubber) or jounce (metal to metal if rubber stop fails). Both transmit much greater loads and hence component stress than springs or dampers, especially the hard shock impact suffered by jounce contact.Countryboy wrote:The road wheel is transmitting load/impacts to the lower fulcrum pin . The telescopic damper and I'm guessing uprated coil Spring are more effectively resisting those loads/impacts . In the end somethings got to give...
Wheel kerbing is another common high stress impact, which could have instigated these wishbone pan cracks.
Probably not under all the road grime, especially as crack initiation to failure would take much less than a year (when we had MOTs)...Countryboy wrote:I wonder if these cracks would happen suddenly or if you were really lucky your MOT tester might spot them
Seems we've returned again to the wheels falling off...