Besides bearing failure, the other reason for replacing stock axles is they were made from mild steel.
Not good..since they were undersized from the factory, the wheel bearing will wear the axle over time. All original 30+ year old axles will probably have varying degrees of groove on them by now.
Again, not good, since the stock axle is hollow, it is very possible to snap the axle while driving!! Especially when you consider the side loads our cars are now subjected to with modern big wheels and sticky tires.
In contrast, all aftermarket axles are solid, correctly sized units.
Josh
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