I KNOW there is a thread somewhere about this but couldn't find it.
I decided to rebuild my 30 and see how long till she blows apart. I'm just putting new seals and bearings in. On the pinion and ring gear there are numbers. I know there's a number on there somewhere that gives a reference to factory shim thickness. Here's some pictures if they will help. The numbers on the pinion are like this: 7 7 78
Ring gear numbers: 7 10 78 DANA E A3D43 32657 46 13 644
Here's some pictures if they will help.
Thanks a lot guys