@JEEPCJTJ Just to clarify, my Jeep is a '97 Sport, but I was told by the previous owner that the axles are both Dana 44s from an '04 Rubicon. The axles do appear to be Dana 44s from the cover bolt pattern and from various comments from folks (nobody has disputed that as far as I know). So for anything related to the axles, I am referring to the '04 manual. I think this makes the most sense. The reference you posted is in line with everything I've read so far, if my Jeep had stock axles.
The caveat to all this is that I'm not sure how to positively identify the specific axle models other than Dana 44 (e.g., if the previous owner was wrong about the '04 Rubicon origin) since Dana 44s appear to fluctuate in gear oil capacity specs. The spec might also deviate with the aftermarket valve cover (I haven't had much time to look into this yet). Others have pointed out how I could achieve the proper fill level based on the axle height, and how the fill level might correct itself a little via the vent tube. However, at this point I've refilled the axle twice and plan to leave it at a little over two quarts each. I will also try to monitor any spillage from the vent tube as it gets driven. If I suspect the 2 quart spec is off, I will revert to the manual fluid check others have suggested (looking at fluid level with respect to the axle, ignoring the manual specs). I'll also try to make a note of this for the next time I change the gear oil.
All the feedback on this form has been really helpful and greatly appreciated!