Larger Ring & Pinion, Less Gear Oil Capacity?

[Mike]

Just swapped 3:73s for 4:88s in my JKUR Dana 44s and after the 500 mile break-in, the differential held a little less than 2 quarts of gear oil. The normal capacity is listed as 2.4 quarts. I assume the new gear set is physically larger than the old one and therefore displaces some of the oil. Has anyone noticed this before?

 

[IndominusHuman]

Seems like a logical explanation. The capacity is set for stock gearing so i wouldn't worry about it too much.

 

[Chris]

It may hold a little less, yes. However, you can also add a little more and it won't hurt.