I hope you don't mind if I give you my opinion on this.
Most of the axles assemblies you get from national chains (like Autozone, Advance etc.) are assembled in Mexico with new parts (like C/V joints & tri-pots) made in China. Whenever you get axle diameters that are not the correct size or assemblies that are too long or too short, you can blame that on the school children that are assembling them in Mexico at $1.00/hour. Whenever you see that they are made using new parts, thatnormally would be a good thing. However, the made in China C/V's & tri-pots are typically inferior in materials & hardness.
No matter what the cost, a broken C/V joint will leave your car hurt, wounded (or worse) at the side of the road.
You see the big national chains, don't have the time to get good rebuildable donor parts from junkyards across the country in the quantities that they need. So it's just cheaper for them to just get them made in China by children in sweatshops.
You're much better off to find a local "Mom & Pop" C/V axle rebuilding shop & have them supply you some axles. They get their supplies from local junkyards & inspect & refurb them.
If you don't know how to find a local "Mom & Pop" C/V axle rebuilding shop, just ask around in your area.
Archie
[This message has been edited by Archie (edited 09-08-2009).]