we have had the left side axle break at the welds. the tube completly broke on ours. this was belived to be due to the bin extensions, duals, the torsion bar across the frame that helps take the strain off the axle and running in alot of mud. our broke while running soybeans. we repaired the axle by sliding in a tube with 1_4 inch thick sidewalls inside old axle for reinforcement.