Stock axles

This has probably been answered before but i can't find it and I'm fairly new to customizing and lifting jeeps. Where can I find on the vehicle the axle size? Also, does anyone know the stock rear axle size on a 91, 4.0?

most likely a D35. You can tell by looking at the diff covers. Do some searches and you will find some links to pics to guide ya.

Well all, I found the answer. I have the 8.25 rear axle, not a d35. If anyone else out there needs to figure out the difference the 8.25 has two little lips at the bottom left and right of the diff. The D35 is round. Follow link on last thread for pictures. http://www.naxja.org/forum/showthread.php?t=25006&highlight=axle+diameter+d35