Help: Differential Cover Drain Plug Question

[goser]

Discovered today that I'm leaking differential fluid. It appears to be seeping out right through the rusted differential cover. Unfortunately, someone has previously stripped out the fill plug, so I can't even check the level, let alone refill it when I pull off the diff cover.

I'm looking at a Dorman replacement cover that has a drain plug on it. I'm wondering if it would be possible to use the drain plug as a fill plug as well. Just wondering if anyone has ever done this, or has any other suggestions for me. Thanks!

[FishFind]

As far as I remember it only has one plug. You fill it to the bottom of the whole and yer done.

[goser]

Cool, thanks. So they shoud really call it a fill plug, not a drain plug...