Quote Originally Posted by KrazyKarl02 View Post
I guess what guys like D.D. Machine do is cut the shaft then re-heat treat it? I know he had an option where you could send in your current shaft and he would cut it down.

Side note, Scott had an axle shaft resplined by Moser. I don't think it was heat treated after the machining and I am guessing it is still working. So why would that work and not this? Is it because you have to take too much material off and get out of the outside hardened area?
so I just looked at this thread...

there is only like one company that heat treats after machining and only one that rolls the splines. If you read the "sales pitch" on Moser or some of the other custom axle guys, cut threads sound just fine.

Actually - all new shafts from Moser and Currie (amung others) are cut after heat treating.