Is there a website somewhere that tells you what the letters and numbers in your VIN stand for? I should be able to tell color, engine, transmission, rear-end gearing, etc. from the VIN, right? How do I decipher the VIN?
The front is a Dana 30 (no other factory options). For the rear, both the Dana 35 and Corporate (Chrysler) 8.25 will have ten-bolt, oval covers. The difference is that the C-8.25 will have a flat-lipped bottom.
Ok, I checked out my rear diff this morning. There is a little metal tag attached to one of the bolts that says '3.5'. This is molded into the bottom of the housing: MS3670A. (I believe that's what it said.)
That's the gear ratio. It means you have a 3.55 ring and pinion gearset. I'm still trying to find actual pictures to show you the difference between the D35 and C-8.25.
EDIT: Here we go, thanks to Yucca-Man. http://www.yuccaman.com/jeep/gear1.html#axle