Gday, I am getting a R31 diff housing shortened at the local shop but they wont do the 4 stud axles cause they dont have the resplining gear. Another shop can do my 4 stud axles but where I want the axles resplined the axle shaft is a smaller diameter, only by 0.6mm.

SO my question is who out there has come across this problem and what are the solutions.

Everyone I have spoken to says I must build up the shaft diameter by either welding or metal spray then latheing it down and resplinging. But this goes against my understanding of axles and how they twist. By heating up the end of the axle, via the welding or metal spray the axle will become hard and brittle loosing its twisting ability.

Sorry for the long winded question but I tryed to explane everything. Thanks for reading