You might want to check the local Auto Parts chain stores. They sell rebuilt as well as new made in China Axles.
I have rebuilt Axles from one of the chain stores that have been on the care for 1.5 years and no prblems. However, this represents about 3,000 miles as I do only local driving.
At the time the China Axles were not know to me or as availble by as many sellers as they are now.
Some Members have had a problem due to the spacing shims and the radius on the China Axles not being compatable. If you want to look at a thread concerning this one of the members was, fruitcakesa.

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84 300D, 82 Volvo 244Gl Diesel