[1952henry]

I know you said you weren’t going to tackle this, but I would suggest getting a gallon of Rust 911. It is pricey per gallon, but one gallon makes 16 of solution. If you don’t have a bead blaster, you will find this stuff invaluable. Not bad, and it is effective. If you have a way to keep container warm, so much the better. Drop the differential carrier in the solution and leave it alone for awhile. At least you will see what you have after rinsing it off.