If you look at the rear diff there is a metal tag on the left side. There are a bunch of #'s embossed in it. The last 3 are the gears. It's dirty and hard to read, but you can do it. While you're looking, note the drain plug in the diff. If it's metal and has a square recess to accept a socket driver, it's a D44. If its larger and a plastic plug, it's a D35. Your front will be a D30 with the same drain plug as a D44.