What can the 7.25 handle?

I have had a few last for a decent amount of time but discovered that the 7-1/4 cannot stand to have one wheel spin and then get sudden traction. The pinions and cross shaft rip right out of the case. I live in an area that gets ice and snow throughout the winter and have a pile of seven destroyed 7-1/4 rear axles and the most power applied to any of those came from a 273 two barrel. Even when I tried to be careful on ice with a slant six the 7-1/4 would sooner or later fail the pinions. If you have a stronger rear axle available I would recommend a change.