On Monday, August 24, 2015 at 2:33:27 PM UTC-4, Waveguru wrote:
Could the bolts have been over torqued?

Boggs

Nope
Pawnees, as a group, have very stiff gears due to strong bungees, presumably needed when carrying loads of stuff.
This means that much of the time the only springing is the tires. That puts big sharp loads on the connections, particularly the hydrasorb/bungee assembly joint.
Photos show what appears to be a bracket for a safety cable. Good idea, but doesn't help if the bolts fail obviously. We're now changing bolts every 100 hr or so on our "little" Pawnee.
UH