Interesting because you can see they fracture in a spiral pattern and you can see how deep the hardening goes. The pic of the differential shows the slide hammer attachment Bob at SVS came up with to try to remove the other halfshaft unsuccessfully. Cam at SF4 told me his other halfshaft got stuck in the rear end too when he broke a halfshaft. I wonder if this is generally true as some folks only swap out the broken halfshaft and wouldn't be aware the other is permanently stuck.
Mine and Hal's came out no problem. But yea, the heat treatment given to the OEM shafts are barely sufficient for normal conditions. lol Here are mine...
I worked in design of o.e.m. parts years ago. Part cost comes before part quality in my cases that are not directly safety related. They have cost engineers who have to aprove any part that costs more even if it performs 10 times better. Then the part has to be approved by the buyer. They are rewarded for reducing costs more than for increasing performance at a higher cost. Otherwise cars would cost two, three or four times more. That was a fact of life on auto's when I was involved ( for 7 years ).
