Thank you everyone for the insights into possible reasons this shaft failed. Unfortunately due to costs involved in testing, I won't be able to give a definitive reason. I didn't think testing was so expensive (quotes came in between $6500-7000aud)
Between paying for repairs and the original...
Our thoughts were the radius between the step up is insufficient. But we dismissed that as its almost exactly the same as the different brand replacement
Hi, I'd like to get the groups thoughts on why this axle shaft failed and how to best go about testing the rest of them. The shaft is heat treated 4140, from machining the splines the hardness seems to be the outer 2-3mm.
Unfortunately I don't have much information from the manufacturer to go...
