If your axle still has the original factory gears in it, then 3.54 to 4.30 gears will be on the lower carrier and 4.56 to 7.17 gears will be on the higher carrier. Otherwise, use the table below to determine your differential carrier:
To learn more about differential carriers, see this Crawlpedia article on thick gears and carrier breaks.
If your axle still has the factory installed gears, then you can find them listed on the ratio tag attached to the differential cover, or find the axle BOM number in our Dana 60 BOM Details Chart.
Gear ratio, ring gear rotation, and thick gear designations can be found marked on most gears.