Best way to clean and store 8 3/4?

Got everything cleaned up this morning. Used some silicon spray lube for a temporary solution on the center section. Filled it up and dumped it till no more water was visible in the runoff. Turns out the center section has 2.76 gears so I will be rebuilding it with new gears in the future.

I found this (modified stock photo) in the case and when I pulled one axle out.
upload_2018-8-19_17-53-42.png
when I saw them I assumed they were the thrust spacers. What I didn't realize is they should be on a common pin and peened in place

upload_2018-8-19_17-47-7.png
Looks like mine broke in half at some point.