Hey guys how’s it going? So I went to the track a few weeks ago and couldn’t even run cuz i blew the output shaft. Got the car home to the shop and took it all apart. I just sent my transmission out to be built and I am upgrading the 27 spline output shaft to a 30 spline. I need to upgrade the pinion gear in the differential as well to a 30 spline. Is there some parts I can buy or does it need to be machined? Would it be the pinion gear or the pinion yolk? I don’t know much because I really don’t work on my own stuff due to the fact I usually make things worse or break something else. Does anyone know what I would need and have done this before?


This is on an 08 z51 6 speed On motor making 501rwhp and 436rwtq and on a 150 shot making 650rwhp and 660rwtq. Any help greatly appreciated