I still have original hollow axles on my scrambler with a max 2 drivetrain.I have rubber tracks and made my own hubs a nd extension.I only have had one axle break and that was at the flange.My axles are actually the 3 stud with 4 stud homemade wheel hubs welded to them.I was told over and over that I better go to solid axles.All I did was mig weld all around my axle hubs.I added 3 or 4 beads.M flanges are not even gusseted and I have not broke any hollow axles.I have 14 inch studded rubber snowmobile tracks on each side with golf cart rims and at101 tires.I was out Friday for over an hour in over a foot of snow going over mounds of tree limbs stacked up to keep atvs out.I am only running the rear chains.My axles do fine.The only one that broke was severely bent when I bought the machine.It broke before I even built my tracks,I was just wheelin in my front yard.Every machine has a failsafe.Something will break no matter what .That's why I like the bolted sprockets,the bolt should break before your axle.Something is not right.I hope you get it get it figured out.I made my own replacement axle,sprocket and hub because I am a tightwad,my track came off once and that was brutal ,my tracks are extremely heavy because I have homemade steel track
wheel guides.Maybe you can weld up your broken axles.