How do you read the tag on a 1979 jeep cj5 front differential The tag i have reads as follows. 5358563 3 54 46-13?

well from what I see, the Axle is gear 3.54. there should be a "." in between the 3 and the 5.

46 is the number of teeth on the ring gear. 13 is the number on the pinion. 46 divided by 13 equals 3.54. That is where your gear ratio comes from. 5358563 sounds like a part number .