rear differential, anything to upgrade?

I just broke a rear axle(the shaft broke) and installed a complete HD cv alxe, I will do the same on the other side soon. so now I’m thinking if I should upgrade anything else than the axles on the rear drivetrain or if the diff etc is ”ok”?

because on on front for examble I was breaking cv joints, installed some HD ones and then broke the pignon cover which made the pignon and ring gear broke, installed a HD pignon cover and now I need to reinforce the diff mount on the frame as its craking in several places