Rear diff fill bolt location

[dude55man]

I've got an 06 ranger that I would like to change the rear diff oil, however, I cannot find the fill bolt, that could be either I'm blind as a bat, or just plain dumb. Anyway here is a picture of the cover plate, if it helps any.
https://www.dropbox.com/s/gp15xas8kvmxg5r/20180731_171214.jpg?dl=0

 

[adsm08]

Driver's side of the diff housing, midway between the ring and the pinion flange, above the fin.

 

[JohnnyO]

As adsm08 said, it's on the housing and not the cover. FWIW if you can find a junkyard that will part with one separate from the axle, the cover on an '02-up Explorer IRS has fill and drain plugs and will bolt right on if you grind off the IRS mounting ears on each side.

 

[Dirtman]

+3 will have a female square drive head on it.

Transmissions are something I hate not having a drain bolt on but besides the ability to drain the fluid slightly cleaner the cover should still always be removed on a diff whether it has a drain or not. There's no filter in there! Always good to clean anything out especially in a LS where clutch material slowly wears.