Crawl under jeep. On the differential covers there should be a metal tag with some numbers on it. You should see the 30 on the front axle. On the rear, you will probably see the 35, but possible the 44. Then you'll see some numbers like 3.07 or 3.54 or 3.73. I'd be willing to bet that you got one of those. If I had to shoot in the dark, I'd say D30 front with 3.07 and D35 rear with 3.07.
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