Differential fluid level [1915 Overland]

[MochetVelo]

Here is a general question regarding differential fluid levels. I filled my Overland diff. about 1/3 with 600-wt oil. The level is just above the ring gear teeth and below the spider gear case. It would seem that this would lubricate all the gears without pushing oil out the axle tubes. Here's a photo. Any thoughts?

 

Phil

 

 

[Mark Shaw]

Looks right to me as long as it is heavy lube (SAE 250 or 600wt depending on what scale you use).

[Akstraw]

1/3 full is the common recommendation for cars of that era.  I think your logic is sound.