[jim sewell]

An alternative to torque breaking rear axles is loose or out of adjustment side bearings in the differential .
Under power ( torque ) the carrier unit will shift out of alignment with the axles and try to bend them while they are turning .

While the diff centre is out for the axle replacement it may be worth going through the side bearing and backlash adjustment .

Also as you would be aware driving with a broken axle and not disconnecting the tailshaft and axle shafts increases the chance of picking up broken axle pieces and which may become wedged between gears thus damaging the gears in the differential.

Regards
Jim S.