HO52 Clean Up?

[30fathoms]

Howdy all,

Been lurking for a while and learned a ton for our '64 C20 restoration; this is a great site - thank you!

We recently managed to find a very lightly used HO52 third member out of a '71 C20. The housing letter code and ring stamps ID'd it as 4.10 unit.

Although the internals look very solid, I fear it needs a complete tear-down as there is fine dirt and sand throughout bearings, spiders, and I suspect the pinion bearing as well. Not having disassembled one of these before, I am looking for tips, tricks, or voodoo which might ensure success in a thorough cleaning and reassembly. I've read if the ring/pinion relationship is disturbed, one can risk gear noise or worse so I'd like to make sure we get this right.

Thank you in advance,

30f